Number of Movies

Frequency

0 25

1 18

2 24

3 16

4 5

TOTAL: 88

The following data shows the number of movies 88 students watched one week during the summer.

Calculate: •The sample mean

•The first quartile

•The median

•The third quartile

•The IQR

Data must be entered into your calculator.

Graph: •Boxplot

Default

•Histogram

DefaultSet Window

Data must be entered into your calculator.

Length of Call Frequency

4 25

14 15

24 10

34 9

44 4

54 1

The following data shows the lengths (in minutes) of 64 international telephone calls using a prepaid calling card.

Calculate: •The sample mean

•The sample standard deviation

•The first quartile

•The median

•The third quartile

•The IQR

Plot: •Boxplot

•Histogram

Does the histogram of this data appear to be

•Skewed right?•Skewed left?•Symmetrical?

Are their any potential outliers (values that do not seem to “fit” the rest of the data)?

•Are there any values 1.5*IQR above Q3?•Are there any values 1.5*IQR below Q1?

Potential Outliers require further investigation.

1.5*IQR = 1.5*(Q3-Q1) = 1.5*(24-4) = 30

•Are there any values 1.5*IQR above Q3?Q3 + 1.5*IQR = 24 + 30 = 54NO. The largest value is 54.

•Are there any values 1.5*IQR below Q1?Q1 – 1.5*IQR = 4 – 30 = - 26NO. The smallest value is 4.