Difference Between Diagram and Graph for Class

8/12/2019 Difference Between Diagram and Graph for Class

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Difference between diagram and

graph

A diagram is a visual form of

presentation of statistical data


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A graph is a visual form of presentation of

statistical data which is drawn in a graph

paper


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diagram graph

Paper Ordinary Graph paper

undersatndability Easily Some efforts

Variables More Less

Analysis not used for further used

Comparision comparision Reltionship (time)

Data represented Bars , pie Points and lines t

attractiveness More attrctive Less

Mostly used Advertising Researchers


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diagram

One dimensional diagrams

Line

Bars

vertical bar

Horizonatal bar

Multiple or compound

Sub divided bar diagrams

Two dimensionalPie


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Graph

Histogram

Frequency polygon

Cumulative frequency curve


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Line diagram

It is simple to draw

X- axis discrete data variabes

Y axisfrequency

On the basis of the size of fiqures , the heightsof lines are drawn

The distance in the bars are kept uniform

The limitation of the diagram is not attractive

No width


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Draw the line diagram

Year No of students passed

2001 5

2002 7

2003 12

2004 5

2005 13

2006 15


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A bar chartor bar graphis a chartwith

rectangularbars with lengthsproportional to

the values that they represent. The bars can

be plotted vertically or horizontally
http://en.wikipedia.org/wiki/Charthttp://en.wikipedia.org/wiki/Rectanglehttp://en.wikipedia.org/wiki/Lengthhttp://en.wikipedia.org/wiki/Lengthhttp://en.wikipedia.org/wiki/Rectanglehttp://en.wikipedia.org/wiki/Chart


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three types

Simple bar

Multiple bar

Subdivided bars


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How Is the Information

Presented?

A bar graph is made.

0

1

2

3

4

5

6

7

Chocolat Vanilla Strawberr Mint & C Rocky RBubble G

Students


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A bar chart is made up of columns plotted ona graph. Here is how to read a bar chart.

The columns are positioned over a label that

represents a categorical variable. The height of the column indicates the size of

the group defined by the column label.

The bar chart below shows average per capitaincome for the four "New" states - New Jersey,New York, New Hampshire, and New Mexico
http://stattrek.com/Help/Glossary.aspx?Target=Categorical%20variablehttp://stattrek.com/Help/Glossary.aspx?Target=Categorical%20variable


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Bar chartsare often used to present data in apictorial form to illustrate the informationcollected and highlight important points. They

are especially useful to depict monthly carproduction, monthly sales, quarterly profit,average annual rainfall etc. A bar chartprovides a useful comparison of data over

time. The height of each bar shows the totalamount of the item of interest for each month(or year).


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Bar charts are drawn with parallel bars placed

vertically (or horizontally). The widthof each

bar andthe spacingbetween the bars are kept

the same to avoid giving a misleading

representation. The height of the bar is drawn

to scale to represent the amount of the item.


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The yearly production of cars by a particular

company is recorded as follows:

Draw a bar chart to display this information.


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Multiple bar diagrams


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It is simple to read a bar chart. Just look at the required barand read off the value. E.g. The bar chart shows that thenumber of cars produced was 160 000 in 2001, 200 000 in2002 and 320 000 in 2003.

Bar charts are used to describe only simple pieces of databut can describe a data set clearly and provide immediatevisual impact. It is clear from the bar chart that the carproduction by the company had increased more slowlybetween 2001 and 2002 than between 2002 and 2003.

Bar charts are useful for presenting data sets consisting of anumber of values that are each assigned to differentcategories such as years, months, quarters


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Two dimensional diagram

Pie


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To draw a pie chart, divide the circle into 100

percentage parts. Then allocate the number

of percentage parts required for each item.


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A family's weekly expenditure on its house

mortgage, food and fuel is as follows:

Draw a pie chart to display the information.


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Solution:

We can find what percentage of the total

expenditure each item equals.

Percentage of weekly expenditure on:


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How Is the Information

Presented?

A pictograph is made.

Chocolate

Vanilla

Strawberry

Mint & Chip

Rocky Road

Bubble Gum


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Graph

A visual presenattion of graph using special

paper


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Types

Histogram

Frequency polygon

Cumulative frequency curve (ogive)- less than ogive

- more than ogive


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Histogram

Class intervals marked in the x axis

Frequencies are marked in the y axis

Length and breadth is more important

Each rectangle is joined with other

Blan space between the rectangles refers no

vlaues in that class interval


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Frequency polygon


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Stem and leaf

Stems

150

140130

120

110

100

90

80

Leaves

1

2 6

4 5 7 9

1 2 2 2 5 7 9 9

0 2 3 4 4 5 7 8 9 9

1 1 4 7 8


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In a stemplot, the entries on the left are called stems;and the entries on the right are called leaves. In theexample above, the stems are tens (80 and 90) andhundreds (100 through 140). However, they could beother units - millions, thousands, ones, tenths, etc. Inthe example above, the stems and leaves are explicitlylabeled for educational purposes. In the real world,however, stemplots usually do not include explicitlabels for the stems and leaves.

Some stemplots include a key to help the user interpretthe display correctly. The key in the stemplot aboveindicates that a stem of 110 with a leaf of 7 representsan IQ score of 117


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find rangestem 80

70

6050

40

30

20

10

leaf

1

4 72 2 6

0 2 5 7 9 9

5 7 9

7 9

1

The stemplot below shows the number of hot

dogs eaten by contestants in a recent hot dog

eating contest

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Difference Between Diagram and Graph for Class