Download doc - Quiz MB0040 Statistic for Management Final

QUIZ - MB 0040 STATISTIC FOR MANAGEMENT

Question:In industry Statistics is applied in the following areasResponse:

Quality control

Question:In which of the area Statistics is not appliedResponse:

Booking a Railway ticket

Question:Statistics are collected in aResponse:

Systematic manner

Question:Statistics deals with Response:

Aggregate of facts

Question:The study of movement of wholesale prices of a commodity Response:

Requires Statistics

Question:Statistics can be applied inResponse:

Quality control methods and planned recruitment

Question:In modern days many organizationsResponse:

Are rich on data and do not draw information from it

Question:Statistics in singular noun is defined asResponse:

The science of collection, presentation, analysis and interpretation of numerical data

Question:Statistics isResponse:

Affected by external forces and are expressed numerically

Question:

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In industry Statistics is applied in the following areasResponse:

Quality control

Question:In which of the area Statistics is not appliedResponse:

Booking a Railway ticket

Question:Statistics are collected in aResponse:

Systematic manner

Question:Statistics deals with Response:

Aggregate of facts

Question:The study of movement of wholesale prices of a commodity Response:

Requires Statistics

Question:A person is hired by a five star hotel to study the possibility of improving the returns through customer's satisfaction. The person appointed for this purpose collects data from the customers with respect to the quality of food and service, satisfaction and price aspects.i. The Hotel management collects data by Response:

Through agent

Question:A person is hired by a five star hotel to study the possibility of improving the returns through customer's satisfaction. The person appointed for this purpose collects data from the customers with respect to the quality of food and service, satisfaction and price aspects.ii. Two of the information collected belong to intangible cadre. They are Response:

Quality of food and service

Question:A person is hired by a five star hotel to study the possibility of improving the returns through customer's satisfaction. The person appointed for this purpose collects data from the customers with respect to the quality of food and service, satisfaction and price aspects.iii. The information will help the management Response:

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To reorganize and improve in all respects

Question:A person is hired by a five star hotel to study the possibility of improving the returns through customer's satisfaction. The person appointed for this purpose collects data from the customers with respect to the quality of food and service, satisfaction and price aspects.iv. Service level can be improved by Response:

Giving proper training

Question:A hospital wants to start some new department for treating patients. Since the cost will be high they decide to estimate the return.i. The most appropriate units of observation will be . Response:

The return received by other hospitals having same department

Question:A hospital wants to start some new department for treating patients. Since the cost will be high they decide to estimate the return.ii. The data is collected by Response:

Secondary source

Question:A hospital wants to start some new department for treating patients. Since the cost will be high they decide to estimate the return.iii. Unit of measurement will be Response:

Percentage net return

Question:A hospital wants to start some new department for treating patients. Since the cost will be high they decide to estimate the return.iv. Another useful added information for the purpose of investigation isResponse:

Percentage of patients wanting such new department

Question:Suppose the State Government wishes to find the average yield of wheat per acre then

i. As first step, it should get information on Response:

Total number of acre and yield available in the state

Question:Suppose the State Government wishes to find the average yield of wheat per acre thenii. The data for (i) can be obtained from Response:

Secondary source

Question:

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Suppose the State Government wishes to find the average yield of wheat per acre theniii. The scope of the investigation is Response:

Land used for wheat production

Question:Suppose the State Government wishes to find the average yield of wheat per acre theniv. Data collected should be in terms of Response:

Kg / acre

Question:A properly planned investigations leads toResponse:

Best results with minimum cost and time

Question:Control methods are used toResponse:

Check accuracy, coverage, analysis and interpretation

Question:The objectives of investigation could beResponse:

To obtain certain estimates or to establish a theory or to verify the existing relationship

Question:The scope of investigation covers such asResponse:

Area to be covered, time, and cost

Question:Sequence of planning a survey isResponse:

Defining the problem, specifying objectives, scope of investigation and organization

Question:Control methods adopted in a survey at every stage is to checkResponse:

Accuracy, measurement analysis and interpretation

Question:Statistical Survey is a scientific process ofResponse:

Collection and analysis of numerical data

Question:The collected data should be firstResponse:

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Edited

Question:The relevance and accuracy of data depends upon care exercised duringResponse:

Planning and execution

Question:Classification Response:

Reduces the bulk data

Question:Classification done according to two variables is known as Response:

Two-way classification

Question:Classification follows Response:

c. Collection

Question:Classification of employees according to skill, sex and education comes under Response:

Manifold

Question:Classification of workers according to education and skill is called Response:

Two-way

Question:Data arranged logically according to size is known as Response:

Statistical series

Question:Data classified according to the time of occurrence is known as Response:

Chronological classification

Score of NA Question:Data that are immeasurable is classified under Response:

Qualitative classification

Feedback:

Question:In classification each unit is allotted to Response:

Two or more groups

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Question:

Response:

b

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Question:

Response:

b

Question:

Response:

200

Question:There are 200 employees in a firm. 81 of them are Male and the rest Female. 12 of them are Doctorates 53 of them are Graduates and the rest Post graduates. Education level of females are as follows: 8 doctorates 89 Post graduates and the rest graduates. Without tabulating can we quickly say that Response:

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Difficult to say

Question:

Response:

d

Question:

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Response:a

Question:There are 200 employees in a firm. 81 of them are Male and the rest Female. 12 of them are Doctorates 53 of them are Graduates and the rest Post graduates. Education level of females are as follows: 8 doctorates 89 Post graduates and the rest graduates i. The above form of describing a situation is known as Response:

Text form

Question:There are 200 employees in a firm. 81 of them are Male and the rest Female. 12 of them are Doctorates 53 of them are Graduates and the rest Post graduates. Education level of females are as follows: 8 doctorates 89 Post graduates and the rest graduates.Then Tabulation Response:

Make comparisons easier

Question:

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Response:a

Question:

Response:

d

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Question:

Response:

b

Question:

Response:

a

Question:Classifications done on the basis of attributes blindness and region are known as Response:

Two-way qualitative and geographical classification

Question:Raw data relating to weight and height of people of residential complex can be Response:

Classified according to two different classes

Question:

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Two functions of classification areResponse:

Reduce bulk data and facilitate comparisons

Question:Two requisites of good classification areResponse:

Exhaustive and revealing

Question:Classifications done on the basis of attributes blindness and region are known as Response:

Two-way qualitative and geographical classification

Question:Raw data relating to weight and height of people of residential complex can be Response:

Classified according to two different classes

Question:Two functions of classification areResponse:

Reduce bulk data and facilitate comparisons

Question:Two requisites of good classification areResponse:

Exhaustive and revealing

Question:A good average must be Response:

Based on all values and rigidly defined

Question:Find the mean value for the grouped dataC.I 10-20 20-30 30-40 40-50 50-60 60-70Freq 15 10 8 12 16 9 Response:

35.44

Question:The mean of the following distribution isX 145 155 165 175 Freq 10 12 15 10 Response:

160.3

Question:The mean value of age for the data given by

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Age 10 15 20 25 30 No. of people 2 4 5 7 8 Response:

22.9

Question:A good measure of Average should beResponse:

Based on all values

Question:A.M isResponse:

More stable

Question:If to every value of 10, 12, 15, 20, 25 we add 2 then average willResponse:

Increase by 2

Question:It is not possible to calculate A.M. for distributions with Response:

Open-intervals

Question:Measure of central tendency are of Response:

First order

Question:Sum of deviations of individual results taken mean will always be Response:

0

Question:Sum of squares of deviation of individual values taken from mean will always be Response:

Minimum

Question:The average value of -4, -3, 0, 3, 4 is Response:

0

Question:The average value of 10, 12, 15, 17, 6 is Response:

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12

Question:Statistical Average provide basis for Response:

Decision making

Question:A company finds that the efficiency of 60 non-graduates to be 70%, 80 graduates to be 75% and 30 post graduates to be 85%.i)The method used to find overall efficiency is Response:

Combined average

Question:A company finds that the efficiency of 60 non-graduates to be 70%, 80 graduates to be 75% and 30 post graduates to be 85%ii. The average efficiency of non graduates and graduates is Response:

72.86%

Question:A company finds that the efficiency of 60 non-graduates to be 70%, 80 graduates to be 75% and 30 post graduates to be 85%iii. The average efficiency of graduates and post graduates is Response:

77.73%

Question:A company finds that the efficiency of 60 non-graduates to be 70%, 80 graduates to be 75% and 30 post graduates to be 85%iv. The overall efficiency isResponse:

75%

Question:

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Response:

c

Question:Mr. Anil goes to a supermarket. He purchases 8 pieces of item A @ Rs.5/- each, 12 pieces of item B @ Rs.10/- each, 15 pieces of item C @ Rs.20/- each, 10 pieces of item D @ Rs.15/- each and 6 pieces of item E @ Rs.12/- each.It is a ……………. Distribution Response:

Discrete

Question:Mr. Anil goes to a supermarket. He purchases 8 pieces of item A @ Rs.5/- each, 12 pieces of item B @ Rs.10/- each, 15 pieces of item C @ Rs.20/- each, 10 pieces of item D @ Rs.15/- each and 6 pieces of item E @ Rs.12/- each.The average price per piece isResponse:

13.37

Question:Mr. Anil goes to a supermarket. He purchases 8 pieces of item A @ Rs.5/- each, 12 pieces of item B @ Rs.10/- each, 15 pieces of item C @ Rs.20/- each, 10 pieces of item D @ Rs.15/- each and 6 pieces of item E @ Rs.12/- each.The total amount spend by him is Response:

682

Question:A box has 100 tickets with numbers from 1 to 100 one ticket is drawn at random from the box.i. The probability that the number drawn is divisible by 24 is

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Response:

0.04

Question:A box has 100 tickets with numbers from 1 to 100 one ticket is drawn at random from the box.ii. The probability that the number is divisible by 15 or 30 isResponse:

0.06

Question:A box has 100 tickets with numbers from 1 to 100 one ticket is drawn at random from the box.iii. The probability that the number drawn is divisible by 12 or 23 is Response:

0.12

Question:A box has 100 tickets with numbers from 1 to 100 one ticket is drawn at random from the box.iv. The probability that it is divisible by - 25 is Response:

0.04

Question:A sales manager has ten salesmen working under him. He moves with them closely and know the strengths and weakness of each. Under any new circumstances he knows that Rama, Ramu, Ranga and Rathan will succeed in the ratio 2:3:4:6i. The probability that Ramu will succeed isResponse:

3 / 15

Question:A sales manager has ten salesmen working under him. He moves with them closely and know the strengths and weakness of each. Under any new circumstances he knows that Rama, Ramu, Ranga and Rathan will succeed in the ratio 2:3:4:6ii. The probability that Rama and Rathan will succeed isResponse:

4 / 75

Question:A sales manager has ten salesmen working under him. He moves with them closely and know the strengths and weakness of each. Under any new circumstances he knows that Rama, Ramu, Ranga and Rathan will succeed in the ratio 2:3:4:6

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iii. The probability that Ramu or Ranga will succeed isResponse:

7 / 15

Question:A sales manager has ten salesmen working under him. He moves with them closely and know the strengths and weakness of each. Under any new circumstances he knows that Rama, Ramu, Ranga and Rathan will succeed in the ratio 2:3:4:6iv. The type of approach followed by sales manager isResponse:

Subjective

Feedback:

Question:In a housing complex there are 51 apartments. All of them are occupied by individual families. Mr.X living in that complex wishes to form a committee of 5 members by selecting head of the family. Since the idea came from him every body agrees that he should be one memberi. The population is aResponse:

Finite population

Feedback:

Question:In a housing complex there are 51 apartments. All of them are occupied by individual families. Mr.X living in that complex wishes to form a committee of 5 members by selecting head of the family. Since the idea came from him every body agrees that he should be one memberii. The probability that a house hold head will be selected isResponse:

1 / 50

Question:In a housing complex there are 51 apartments. All of them are occupied by individual families. Mr.X living in that complex wishes to form a committee of 5 members by selecting head of the family. Since the idea came from him every body agrees that he should be one memberiii. The probability that six members will be selected isResponse:

0

Question:The probability that Mr.Amar, Ashish and Mr.Astosh will become chairman of a company are 0.4, 0.3 and 0.3 respectively. The probability that they will introduce a new product in the market are 0.08, 0.10 and 0.15 respectively.i. The probability that Mr.Astosh has introduced the new product is Response:

0.42

Question:The probability that Mr.Amar, Ashish and Mr.Astosh will become chairman of a company are 0.4, 0.3 and 0.3 respectively. The probability that they will introduce a new product I the market are 0.08, 0.10 and 0.15 respectively.ii. The probability that either Mr.Amar or Mr.Ashish have introduced the new product isResponse:

0.58

Question:The probability that Mr.Amar, Ashish and Mr.Astosh will become chairman of a company are 0.4, 0.3 and 0.3 respectively. The probability that they will introduce a new product I the market are 0.08, 0.10 and 0.15 respectively.iii. The probability that the new product has been introduced isResponse:

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0.107

Question:The probability that Mr.Amar, Ashish and Mr.Astosh will become chairman of a company are 0.4, 0.3 and 0.3 respectively. The probability that they will introduce a new product I the market are 0.08, 0.10 and 0.15 respectively.iv. The rule used in answering the above questions isResponse:

Baye's

Feedback:This is the right choice.

Question:If A, B and C are the events of getting odd number, even number and pirme numbers respectively when a die is rolled, then A, B and C are Response:

Not mutually exclusive

Question:In classical approach to probability, the probability of an event is determined by Response:

Before conducting experiment

Question:The approach that will be adopted to find the probability that a student selected at random from a particular college will play snooker isResponse:

Empirical

Question:The sample points of the random experiment when 2 coins are tossed at a time are given by Response:

(HH, HT, TH, TT)

Question:Events are said to be mutually exclusive if the occurrence of one Response:

Prevents the occurrence of other

Question:If "m" outcomes are favourable to an event A and "n" are total outcomes of an experiment then P(A) =Response:

m / n

Question:If the chances of occurrence of events are equal then events are called as Response:

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Equally likely

Question:In axiomatic approach value of P(Ai) isResponse:

Between zero and one

Question:In real life it is always not possible to conduct experiment, because of Response:

High cost

Question:In statistical approach probability is determined Response:

After conducting experiment

Question:Probability of getting head when a coin is thrown, comes under Response:

Priori approach

Question:Subjective approach is more suitable if sample size isResponse:

Less than ten

Question:The statistical tool that deals systematically and scientifically with uncertainty is known asResponse:

Probability Theory

Question:When we toss three coins, total outcome is given by Response:

8

Question:"X" is a Poisson variate such that 2P(X = 0) = P(X = 1) theni. The mean of the distribution is Response:

2

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Feedback:This is the right choice, P(X=x) = e-m *mx/x!So, 2P(X=0) = P(X=1)=>2 (e-m * m0/0!)= e-m * m1/1!=>2 e-m * 1= e-m * m (since m0/0!=1)=>m=2 (since e-m is common)

Question:"X" is a Poisson variate such that 2P(X = 0) = P(X = 1) thenii. P(X = 0) is Response:

0.135

Feedback:

Question:"X" is a Poisson variate such that 2P(X = 0) = P(X = 1) theniii. P(X ≥ 1)Response:

0.865

Question:"X" is a Poisson variate such that 2P(X = 0) = P(X = 1) theniv. P(1 ≤ x ≤ 3)Response:

0.90

Feedback:This is the right choice,P(X=1)+P(X=2)+P(x=3) (e-2*21/1!) + (e-2*22/2!) + (e-2 *23/3!) e-2 *2 ( 1+1+2/3) => 2e-2 (8/3) 16/3(0.13533) = 0.721.

Question:A company produces two products A and B. Out of 5 products of A one was found to be defective. Out of 6 products of B 2 were found to be defectivei. Probability that exactly one will be defective in product B isResponse:

0.263

Question:A company produces two products A and B. Out of 5 products of A one was found to be defective. Out of 6 products of B 2 were found to be defectiveii. Probability that one of A and one of B will be defective isResponse:

0.1077

Feedback:

Question:A company produces two products A and B. Out of 5 products of A one was found to be defective. Out of 6 products of B 2 were found to be defectiveiii. Probability that either one of A or two of B will be defectiveResponse:

0.8388

Feedback:

Question:A company produces two products A and B. Out of 5 products of A one was found to be defective. Out of 6 products of B 2 were found to be defectiveiv. The event of either getting 2 defectives in A or one defect in B areResponse:

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Mutually exclusive

Feedback:

Question:In a Binomial distribution p = 0.4 and n = 6 theni. P(x = 0) is Response:

0.046

Feedback:

Question:In a Binomial distribution p = 0.4 and n = 6 then ii. P(X >= 4) isResponse:

0.007

Question:In a Binomial distribution p = 0.4 and n = 6 then iii. P(X ≥ 1) isResponse:

0.1296

Question:In a Binomial distribution p = 0.4 and n = 6 theniv. P(X = 3) is Response:

0.2764

Feedback:

Question:The average closing of a savings banks account which is normally distributed was found to be 35 months with a S.D of 5 months. Theni. The probability that SB A/c will be closed on or before 25 months isResponse:

0.4772

Feedback:

Question:The average closing of a savings banks account which is normally distributed was found to be 35 months with a S.D of 5 months. Thenii. The probability that it will be alive between 30 and 40 months is

Response:

0.6826


Question:The average closing of a savings banks account which is normally distributed was found to be 35 months with a S.D of 5 months. Theniii. The probability that it will be alive after 42.5 months isResponse:

0.0668

Feedback:

Question:The average closing of a savings banks account which is normally distributed was found to be 35 months with a S.D of 5 months. Then

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iv. The probability that it exists between 40 and 45 months isResponse:

0.1359

Question:There are 625 packets of a product. Each packet contains 4 products. The probability that a product will be defective is 0.2. Theni. Expected number of packets to contain zero defectivesResponse:

256

Question:There are 625 packets of a product. Each packet contains 4 products. The probability that a product will be defective is 0.2. Thenii. Expected number of packets to contains exactly two defectivesResponse:

96

Feedback:

Question:There are 625 packets of a product. Each packet contains 4 products. The probability that a product will be defective is 0.2. Theniii. Expected number of packets to contain 3 or more defectivesResponse:

16


Question:There are 625 packets of a product. Each packet contains 4 products. The probability that a product will be defective is 0.2. Theniv. Expected number of packets to contain 1 or 2 defectiveResponse:

352

Feedback:

Question:8C2 q8-2 p2 representsResponse:

Probability of 2 success

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Question:8C2 q8-2 p2 represents Response:

Probability of 2 success

Feedback:

Question:If T2 = 28, N = 256, n = 8, p = q = 1/2 then T3 is Response:

56

Question:The 5th term in the expansion of (q+p)12 are a. 12C5 q5 p10 b. 12C6 q10 p5 c. 12C5 q5 p8 d. 12C4 q8 p4 a. c b. a c. b d. d Response:

d

Feedback:

Question:The probability of getting an occupational disease is 1/4. Out of 5 employees, the probability that exactly 2 will get the disease isResponse:

135/512

Feedback:

Question:Two examples of observed discrete frequency distributions are Response:

No. of children in the family and No. of pedals in a flower

Feedback:

Question:Binomial distribution has Response:

One mode

Feedback:

Question:For Binomial distribution np = 5 and npq= 4, then p = Response:

0.2

Feedback:

Question:

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For the binomial (0.2 + 0.8)6, mean is Response:

4.8

Question:If n = 10, p = 0.3 for a Binomial distribution then its mean and variance are Response:

3, 2.1

Question:If x is a binomial variate with p = 0.46, then q = Response:

0.54

Feedback:This is the right choice,since q=1-p=1-0.46=0.54.

Question:In the expansion of (q + p)n, there are Response:

n+1 terms

Feedback:This is the right choice since the successive terms gives the probbaility from 0,1….

Question:Number of pedals in a flower is an example of Response:

Binomial variate type


Question:The Bernoulli variable assumes values Response:

0,1

Feedback: This is the right choice.

Question:The expansion (0.2 + 0.8)6 will have Response:

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7 terms


Question:The mean and variance of Binomial distribution are Response:

np, npq

Question:From a population whose mean is 40, a random sample of 10 are taken. The sample mean is 39.2 and S.D 4.i. Population parameter and sample Statistics areResponse:

40, 39.2

Question:From a population whose mean is 40, a random sample of 10 are taken. The sample mean is 39.2 and S.D 4.ii. Standard error of mean is Response:

1.33

Feedback:

Question:From a population whose mean is 40, a random sample of 10 are taken. The sample mean is 39.2 and S.D 4.iii. 39.2 is known asResponse:

Point estimate

Feedback:

Question:From a population whose mean is 40, a random sample of 10 are taken. The sample mean is 39.2 and S.D 4.iv. The internal estimate can be found ifResponse:

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Confidence level is given


Question:From past records the liking of customers towards the colour of product Viz, Red, green, pink, blue and yellow were found to be in the ratio 2:3:5:3:2 respectively. A sample of 300 customer revealed the liking towards the colour as 39, 62, 100, 60, 41 respectively.i. The sample has followedResponse:

Law of statistical regularity

Feedback:

Question:From past records the liking of customers towards the colour of product Viz, Red, green, pink, blue and yellow were found to be in the ratio 2:3:5:3:2 respectively. A sample of 300 customer revealed the liking towards the colour as 39, 62, 100, 60, 41 respectively.ii. The population considered isResponse:

Existent

Feedback:

Question:From past records the liking of customers towards the colour of product Viz, Red, green, pink, blue and yellow were found to be in the ratio 2:3:5:3:2 respectively. A sample of 300 customer revealed the liking towards the colour as 39, 62, 100, 60, 41 respectively.iii. Exact proportion has been found in the sample for coloursResponse:

Pink and Blue

Question:From past records the liking of customers towards the colour of product Viz, Red, green, pink, blue and yellow were found to be in the ratio 2:3:5:3:2 respectively. A sample of 300 customer revealed the liking towards the colour as 39, 62, 100, 60, 41 respectively.iv. The method adopted to estimate population values results inResponse:

Saving of time and cost

Feedback:

Question:Sundaram motors wants to find the proportion of car owners using their cars. It collects information from RTO of Tamil Nadu by selecting ""n"" unit at fixed interval from Car Registration book The type of sampling adopted is known as

Response:

Systematic

Feedback:

Question:Sundaram motors wants to find the proportion of car owners using their cars. It collects information from RTO of Tamil Nadu by selecting ""n"" unit at fixed interval from Car Registration book The fixed interval is determined by

Response:N/n

Feedback:

Question:Sundaram motors wants to find the proportion of car owners using their cars. It collects information from RTO of Tamil Nadu by selecting "n" unit at fixed interval from Car Registration book .

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The precaution that should be taken for this type of sampling is

Response:

Periodic features should not exist

Feedback:

Question:Sundaram motors wants to find the proportion of car owners using their cars. It collects information from RTO of Tamil Nadu by selecting "n" unit at fixed interval from Car Registration book . .The observation made isResponse:

Attribute


Question:The Karnataka Government wishes to experiment with a policy on Twenty villages spread over the state. The success of the policy is measured by agreement or disagreement of the peoplei. The type of sampling that will be adopted isResponse:

Multistage sampling

Feedback:

Question:The Karnataka Government wishes to experiment with a policy on Twenty villages spread over the state. The success of the policy is measured by agreement or disagreement of the peopleii. The type of measurement made belongs to Response:

Attribute

Question:The Karnataka Government wishes to experiment with a policy on Twenty villages spread over the state. The success of the policy is measured by agreement or disagreement of the peopleiii. The sampling units areResponse:

People in selected village


Question:The Karnataka Government wishes to experiment with a policy on Twenty villages spread over the state. The success of the policy is measured by agreement or disagreement of the peopleiv. Scope and purpose of the survey isResponse:

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Crystal clear

Question:A sample is Response:

Subset of population

Question:Examples for existent and hypothetical populations are Response:

Getting defectives in a days production and height of people

Feedback:

Question:In what way statistical survey aimed at determining average blind people in an area Response:

Individuals in that area form population and blindness form observation

Feedback:

Question:In a study to find number of books in different subjects of a library Response:

All books form population units and subject is the characteristics studied

Feedback:

Question:We resort to sampling technique if Response:

The units are destroyed or adversely affected

Question:A population consisting of objects like book is called Response:

Existent population

Feedback:

Question:In short time we gather information about population by Response:

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Sampling

Feedback:

Question:Sampling is the only available method in case of Response:

Infinite population

Feedback:

Question:The group, having some characteristics, consisting of all units is called Response:

Population

Feedback:

Question:The number of points on paper whose dimensions are 1 cm by 2cm is Response:

Infinite

Question:A good Estimator should satisfyi. The criteria Response:

Consistency, Sufficiency, Efficiency and Unbiasedness

Feedback:

Question:A good Estimator should satisfyii. By consistency we mean Response:

As n--> œ, the sample value approaches parameter value

Question:A good Estimator should satisfyiii. By sufficiency we mean Response:

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The estimator makes much use of information given

Feedback:

Question:A good Estimator should satisfyiv. By efficiency we mean Response:

Standard error of statistics is small

Feedback:

Question:For the sample values 10, 12, 15, 18, 22, 25, 32, 34i. Mean is Response:

21.0

Feedback: This is the right choice. Add all the values & divide by the no of values then (10+12+15+18+22+25+32+34)/8 = 21.0

Question:For the sample values 10, 12, 15, 18, 22, 25, 32, 34ii. The standard error of mean is Response:

3.14

Question:For the sample values 10, 12, 15, 18, 22, 25, 32, 34 \iii. 95% confidence limits are Response:

21 ± 7.4

Question:For the sample values 10, 12, 15, 18, 22, 25, 32, 34iv. Coefficient of variation is Response:

42.4%

Question:Mean of a sample size of 15 is 40. Its standard deviation is 8 i. Standard error of mean is Response:

2.14

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Question:Mean of a sample size of 15 is 40. Its standard deviation is 8ii. The standard deviation being same, for the standard error to be 1.07, the sample size should be

Response:

38

Question:Mean of a sample size of 15 is 40. Its standard deviation is 8iii. 95% confidence interval for the mean is Response:

40 ± 3.5

Question:To know the popularity of a particular brand sales manager of a company gathered information by oral interview. Out of 600 people interviewed 420 actually use this brand. The director was not happy with the information. He would like to know the confidence level in the statement i. What type of information the director got from the sales manager Response:

Point estimate

Question:To know the popularity of a particular brand sales manager of a company gathered information by oral interview. Out of 600 people interviewed 420 actually use this brand. The director was not happy with the information. He would like to know the confidence level in the statement ii. The point estimate is given by Response:

70%

Question:To know the popularity of a particular brand sales manager of a company gathered information by oral interview. Out of 600 people interviewed 420 actually use this brand. The director was not happy with the information. He would like to know the confidence level in the statement iii. 95% confidence interval for the estimate is Response:

0.7 ± 0.037

Question:To know the popularity of a particular brand sales manager of a company gathered information by oral interview. Out of 600 people interviewed 420 actually use this brand. The director was not happy with the information. He would like to know the confidence level in the statementiv. 99% confidence interval for the estimate is Response:

0.7 ± 0.048

Question:A point estimate is insufficient because Response:

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It does not give quantitative measure for its correctness

Question:Estimates are necessary to Response:

Deal with uncertainty and make rational decisions

Question:Given mean life of 100 bulbs as 1500 hrs and population standard deviation as 500 hours then 95% confidence interval for population mean is Response:

1500±98

Question:The criteria for a good estimator are Response:

Efficiency, sufficiency, unbiasedness and consistency

Question:Uses of standard error are Response:

To give reliability measure of the estimate and give confidence interval

Question:A sufficient estimator make maximum use of Response:

Sample information

Question:An interval estimate is Response:

A range of values

Question:As sample size increases the statistic is said to moreResponse:

Consistent

Question:Better decisions can be obtained by Response:

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Estimates

Question:It is not possible to avoid as much error as possible by Response:

Guess work

Question:Prospective investors make estimates concerning the behaviour of Response:

Money value

Question:Standard error of mode is 1.20 and that of median is 1.02, then efficient estimator is Response:

Median

Question:Statistical inference is based on Response:

Estimation and hypothesis testing

Question:The lesser the standard error of a statistic then it is said to be more Response:

Efficient

Question:The mean value of an unbiased estimator is always Response:

Equal to population vlue

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Question:

Response:

b

Question:

Response:

c

Question:

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Response:

a

Feedback:

Question:

Response:

c

Question:A null hypothesis states that Response:

There is no significant difference between observed and theoretical values

Question:By Statistical error we mean Response:

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There is a difference between sample value and population due to chance causes

Question:Testing of hypothesis a. Proves H0 is true b. Does prove H0 is false c. Accepts or Rejects H0 d. Accepts HA Response:

c

Question:Type I error is set to a very high level when Response:

It is dangerous to accept a wrong hypothesis

Question:Type I error occurs if a. H0 is accepted when it is true b. H0 is rejected when it is false c. H0 is accepted when it is false d. H0 is Rejected when it is true Response:

d

Question:A hypothesis makes a statement about Response:

Parameters

Question:If the test of significance accepts a null hypothesis, then it means that a. H0 is proved b. HA is proved c. Since H0 is not disproved we accept hypothesis d. H0 is disproved Response:

c

Question:Large sample test are used if the sample size is Response:

Greater than 30

Question:Type I error occurs when sample is taken from Response:

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True population and test rejects it

Feedback:

Question:Upper and lower limits of acceptance region is determined by Response:

Level of significance

Feedback:

Question:

Response:

c

Question:

Response:

a

Feedback:This is the right choice

Question:

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Response:

b

Feedback:

Question:

Response:

d

Question:x2 - distribution is aResponse:

Right skewed distribution with mode dividing it into two equal positions

Question:To apply X2 test a sample must satisfy the conditionsResponse:

Taken from any population and selected at random

Question:x2 test is aResponse:

Non parametric test and takes positive values only

Question:A two-tailed test of two variances is to be performed for sample sizes of 15 and 12. If = 0.10 which of the following represents the upper value to which S12 / S22 should be comparedResponse:

F(14, 11 0.05)

Question:In 500 observations classified into three groups the theoretical values should be in the ratio of 5:3:2. Then the expected values of the classes are respectively

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Response:

250, 150, 100

Question:A two-tailed test of two variances is to be performed for sample sizes of 15 and 12. If = 0.10 which of the following represents the upper value to which S12 / S22 should be comparedResponse:

F(14, 11 0.05)

Question:

Response:

c


Question:If the degrees of freedom increases then the value of X2 will

Response:Increase

Question:X2 is used to test Response:

Several proportions


Question:It cannot be used to test Response:

Estimation of parameter value

Feedback:

Question:It is considered as Response:

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Continuous distribution only

Feedback:

Question:

Response:

b

Question:One of the assumption is the population distribution must be Response:

Need not know anything about the distribution


Question:

Response:

c

Feedback:

Question:X2 test fulfills Response:

Additive property

Question:The sum of squares of "n" independent standard normal variates form Response:

Chi-square distribution

Question:Value of chi-square varies froma. - æ to + æb. 0 to æ

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c. 0 to nd. - æ to 0Response:

b

Question:Chi-square Distribution is Response:

Right - skewed


Question:Chi-square distribution is divided into two equal portions by a. Mean b. Mode c. Median d. æ Response:

c


Question:

Response:

c


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Question:

Response:

b

Feedback:

Question:

Response:

d

Question:

Response:a

Feedback:

Question:If n1 = 10 with S1 and n2 = 15 with S2 such that S2 > S1 then F-Statistics is given bya. S1

2 / S22 with 9 and 14 D.O.F

b. S22 / S1

2 with 9 and 14 D.O.Fc. S2

2 / S12 with 14 and 9 D.O.F

d. S12 / S2

2 with 14 and 9 D.O.FResponse:

c

Question:Two assumption to be satisfied for applying F-test areResponse:

Samples are independent of each other and they should be drawn from Normal population

Question:If n1 = 11 and n2 = 8 with S1 = 5 and S2 = 2 then the null hypothesis will be

MB 0040 Page- 42

Response:

Rejected

Question:Sum of squares of due to total (SST) is split into sum of squares due to factors (SSF) and sum of squares due to error (SSE). The F-test isResponse:

MSF / MSE

Question:ANOVA usesa. t – Testb. F – Testc. Z – Testd. X2 – TestResponse:

b

Question:"F" - test has alwaysResponse:

Two degrees of freedom

Question:Samples must be drawn such that they areResponse:

Independent of each other

Question:To apply F - test the samples are drawnResponse:

At random from Normal population

Question:It is used to testResponse:

Between variances

Question:To apply ANOVA population from which samples are drawn must haveResponse:

Equal variances

Score of NA Question:If F~F(v1,v2) then 1/F~Response:

F (v2, v1)

Question:The F - Statistics is given byResponse:

Variance between samples / Variance within samples

Question:“F” statistics is defined as

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a. S21 / S2

2 where S1 < S2

b. S21 /S2

2 where S1 > S2

c. S22 /S2

1 where S1 > S2

d. S1 /S2 where S1 > S2

Response:

b

Question:Analysis variance splits the total variation intoResponse:

Within groups and between groups

Question:The F - Statistics is given byResponse:

Variance between samples / Variance within samples

Question:It is used to testResponse:

Between variances

Question:If F~F(v1,v2) then 1/F~Response:

F (v2, v1)

Question:ANOVA usesa. t – Testb. F – Testc. Z – Testd. X2 – TestResponse:

b

Question:"F" - test has alwaysResponse:

Two degrees of freedom

Question:To apply F - test the samples are drawnResponse:

At random from Normal population

Question:“F” statistics is defined asa. S2

1 / S22 where S1 < S2

b. S21 /S2

2 where S1 > S2

c. S22 /S2

1 where S1 > S2

d. S1 /S2 where S1 > S2

Response:

b

Question:Samples must be drawn such that they areResponse:

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Independent of each other

Question:To apply ANOVA population from which samples are drawn must haveResponse:

Equal variances

Score of NA Question:Analysis variance splits the total variation intoResponse:

Within groups and between groups

Question:

Response:

d

Question:

Response:

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c

Question:

Response:a

Feedback:

Question:

Response:

b

Question:Correlation is said to be linear and non-linear ifResponse:

The ratio of change between the variables is constant and change in one variable is equal to the percentage change in other variable respectively

Question:For perfectly positive and negative correlation the dots in scatter diagram must lie along a st.line that runsResponse:

Along a straight line that runs from left bottom to right bottom and left top to right bottom respectively

Question:In partial correlation the relationship between two or more variables are studiedResponse:

Between two variables keeping others constant

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Question:If EXY = 150, EX2 = 40 EY2 = 1000 then r is equal toResponse:

0.4

Question:Correlation measuresResponse:

The relationship between two variables and helps estimation

Question:Correlation between two variables may be due toResponse:

Small sample size and third factor

Question:Suppose there is positive correlation between the number of children in the house and number of rats in the house. Then such correlations are known asResponse:

Non-sense correlation

Question:The correlation coefficient is not affected byResponse:

Change of scale and origin

Question:The value of Karl Pearson's correlation coefficient always isResponse:

Lies between minus one and plus one

-2<

r<

2

Question:Can we say rxy = ryx

Response:

Yes

Question:Existence of correlation between two variables may be due toResponse:

A Third factor

Question:If the dots lie all over the graph then the variables haveResponse:

Zero correlation

Question:

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We can quantify the correlation between two variables by scatter diagramResponse:

False

Question:If the dots lie close to a line that runs from left top to right bottom, then the variables are said to beResponse:

Negatively related

Question:One function of correlation analysis isResponse:

To test the relationship between variables

Question:If the dots lies exactly on a straight line that runs from left bottom to right top, then the correlation is said to beResponse:

Perfectly positive

Question:In simple correlation the relationship is studied betweenResponse:

Two variables

Question:Correlation coefficient hasResponse:

No. units attached to it

Question:If two variables move in the opposite direction then they are said to beResponse:

Negatively correlated

Question:In multiple correlation we study the relationship between variablesResponse:

Simultaneously

Question:Scatter Diagram is also known asResponse:

Dot diagram

Question:If the value of r = -1, then the relationship between the variables is said to beResponse:

Perfectly negatively correlated

Question:One of the Statistical tool available to measure the relationship between variables is

MB 0040 Page- 48

Response:

Coefficient of correlation

Question:If two variables move in the same direction there they are said to beResponse:

Positively correlated

Observed correlation may not exist in population due toResponse:

Small sample size

Question:In finding the correlation between supply and demand, we can say the dependent variable asResponse:

None

Question:Main basis for forecasting isResponse:

Time series

Question:Business Forecasting can be done onResponse:

Whole sale prices

Question:Forecasting can be made only onResponse:

Any specific term

Question:Business Forecasting deals withResponse:

Analysis of past and present economic conditions

Question:Business parameters for specific industry deal withResponse:

Specific business activities

Question:Prediction isResponse:

Purely mechanical extrapolation

Question:ii. Health statistics published by Government of India acts as a barometer forResponse:

Planning health-care activities by Government

Question:An economist will like to predict the cost of living index due to hike in petrol prices ii. He will collect information onResponse:

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Cost of living index and corresponding rises in petrol price

Question:A company wishes to increase its sales. It experiments with various slabs of expenses in Advertisement and collects data. i. The most suitable method of forecasting will followResponse:

Time-lag theory

Question:An economist will like to predict the cost of living index due to hike in petrol prices i. For analysis he will studyResponse:

Past and Present behaviour of cost of living index due to rise in petrol price

Question:A company wishes to increase its sales. It experiments with various slabs of expenses in Advertisement and collects data. iv. According to Rhythm theoryResponse:

All economic and business in opposite directions

Question:iv. Extrapolation method of business forecasting assumesResponse:

Constant growth in Arithmetic trend

Question:A company wishes to increase its sales. It experiments with various slabs of expenses in Advertisement and collects data. iii. Action and reaction theory findsResponse:

Four phases of Business activity

Question:i. The export and import statistics of leather and leather related goods acts as a barometer forResponse:

Specific Business activities

Question:An economist will like to predict the cost of living index due to hike in petrol prices iii. The analysis can be based onResponse:

Regression Models

Question:A Business man would like to know what is Business forecasting. He has the following doubts iii. Objective of Business forecasting isResponse:

To give a measure for uncertainty and reduce uncertainty

Question:A Business man would like to know what is Business forecasting. He has the following doubts iv. What is a predictionResponse:

Estimates based on past data

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Score of NA Question:A company wishes to increase its sales. It experiments with various slabs of expenses in Advertisement and collects data. ii. To find the relationship between advertisement expenses and sales; it should useResponse:

Lead correlation

Question:An economist will like to predict the cost of living index due to hike in petrol prices iv. If he wants to predict in terms of the percentage increase he should useResponse:

Modified exponential curve

Question:A Business man would like to know what is Business forecasting. He has the following doubts i. In which one of the following cases forecast will not be appliedResponse:

Buying Mango

Question:A Business man would like to know what is Business forecasting. He has the following doubts ii. Business forecasting meansResponse:

Just analysis of past economic conditions

Question:iii. Business barometer is aResponse:

Scientific and reliable tool for making decisions

Question:Business forecasting deals withResponse:

Analysis of past and economic drawing inferences about probable future Business conditions

Question:Business forecasting helps inResponse:

Reducing uncertainty

Question:Steps in business forecasting involve the following in that orderResponse:

Understanding the past, determining the phase of business activity to be measured, selection and complication of data, Analysis

Question:Business forecasting is necessary because ofResponse:

Growing competition and trends towards automation

Question:The difference between prediction and projection isResponse:

Prediction is an estimate based on past data and projection is an estimate extrapolated values

Question:Mrs. Mallini is a science student. She has data on development of micro organism over regular interval of time. She wants to know the relationship between time and development of micro organism. She approaches Mrs. Shalini, a Statistician and clears certain doubts. iv. The study of time series helps us

MB 0040 Page- 51

Response:

To identify the various forces that affect its behaviour

Question:Mrs. Mallini is a science student. She has data on development of micro organism over regular interval of time. She wants to know the relationship between time and development of micro organism. She approaches Mrs. Shalini, a Statistician and clears certain doubts. ii. Time series is in a month not caused byResponse:

Individuals liking

Question:Mrs. Mallini is a science student. She has data on development of micro organism over regular interval of time. She wants to know the relationship between time and development of micro organism. She approaches Mrs. Shalini, a Statistician and clears certain doubts. i. By time series we understandResponse:

Set of values recorded over a period at regular interval

Question:Mrs. Mallini is a science student. She has data on development of micro organism over regular interval of time. She wants to know the relationship between time and development of micro organism. She approaches Mrs. Shalini, a Statistician and clears certain doubts. iii. The one of the components of time series isResponse:

Erratic variation

Question:Time series analysis helps usResponse:

To identify the forces that influences the variation in time series

Question:Time series analysis is utilized toResponse:

Compare the behaviour of the variable over different period of time

Question:A time series isResponse:

A set of numerical values of a given variable observed at equal intervals of time

Question:Seasonal variations refers toResponse:

Variations in time series that are periodic in nature and occur regularly over short periods during a year

Question:Long term trend refers toResponse:

Smooth long term growth or decline containing a minimum of 4 cycles

Question:Non-linear trend occurs whenResponse:

MB 0040 Page- 52

When variable move at different rates

Question:Irregular variations have amplitude and length of periodResponse:

Neither regular nor equal

Question:Irregular variations are also known asResponse:

Random

Question:A time series isResponse:

Numerical values recorded at successive intervals of time

Question:Analysis of time series deals withResponse:

Studying the effect of various factors over time

Question:Irregular variations are caused byResponse:

Floods

Question:The long-term oscillations that are more than a year is calledResponse:

Cyclical variation

Question:Variations that occur within a year are calledResponse:

Seasonal variations

Question:Changes which occur due to boom and depression in time series are known asResponse:

Cyclical variation

Question:The time series can be used toResponse:

Identify various forces that affect its behaviour

Question:In weighted average of relative the number of commodities involved is

MB 0040 Page- 53

Response:

More than one

Question:When comparative measure is in respect of physical quantities then it is calledResponse:

Volume Index

Question:The first step in the construction of index number is to decide onResponse:

Purpose of index numbers

Question:The statistical measure used to study the changes in a group of related variable over time isResponse:

Index numbers

Question:The commodity selected should beResponse:

non-tangible

Question:Quantity index is based onResponse:

Variables

Question:Which is not a characteristics of Index numberResponse:

Expressed as qualitative values

Question:The value of a variable in a given year divided by the value of the same variable in a specified year is calledResponse:

Relative

Question:Base year values are taken asResponse:

Standard

Question:

MB 0040 Page- 54

Response:

b

Question:

Response:

c

Question:

Response:

d

Question:

Response:

MB 0040 Page- 55

a

Question:J.N.Jewellery's wants to find the changes in Gold price and determine the trend in Indian market. The statement regarding the purpose of index number should beResponse:

Changes in price during last 15 years in India

Question:The price of a commodity in 2005 was Rs.25/ kg. In 2008 it is Rs.120/4 kg. Then price index isResponse:

120

Score of NA Question:An index number is a special ______ and is designed to measureResponse:

Average, changes in a group of related variables over time

Question:Production relative and quantity relative deal withResponse:

Production changes and Quantity changes

Question:The index number for 1998 is 120 and for 2002 is 150. Then index number 1998 calculated with 2002 as base year isResponse:

80

Question:The price of a commodity in 2005 was Rs.25/ kg. In 2008 it is Rs.120/4 kg. Then price index isResponse:

120

Question:J.N.Jewellery's wants to find the changes in Gold price and determine the trend in Indian market. The statement regarding the purpose of index number should beResponse:

Changes in price during last 15 years in India

Question:Production relative and quantity relative deal withResponse:

Production changes and Quantity changes

Question:An index number is a special ______ and is designed to measureResponse:

Average, changes in a group of related variables over time

Question:The index number for 1998 is 120 and for 2002 is 150. Then index number 1998 calculated with 2002 as base year isResponse:

80

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