Measures of Variation

In order to find the median, the data must be sorted from least to greatest first.

• True

• False

The number of miles that Jenna cycled each week for a 7-week period is shown:

36, 42, 28, 52, 48, 36, 31

What is the median number of miles Jenna cycled?

• 24

• 39

• 36

• 52

Find the median for the following prices;

$12.50, $15.50, $15, $17.50, $11.50

• $12.50

• $15

• $17.50

• $11.50

Given the data: 136, 150, 119, 150, 125, 140.

Find the upper quartile (Q3). (Hint... put the numbers in order and find the median to help you find Q3)

• 125

• 139.5

• 150

• 143

Find the lower quartile (Q1) of the following set of scores 6, 7, 8, 9, 11, 13, 15

• 13

• 9

• 7

• 6

Find the IQR (Q3 - Q1) of the data

20, 22, 25, 29, 31

• 30

• 25

• 21

• 9

What is the range of speeds tested?

• 0.5 mph

• 0.3 mph

• 1.5 mph

• 1.3 mph

What is the range of miniature golf scores?

• 44

• 23

• 29

• 39

The table shows the points earned by contestants in a competition. Find the range and the interquartile range of the points.

• Range: 15; IQR: 13

• Range: 15; IQR: 12

• Range: 15; IQR: 11

• Range: 15; IQR: 10

Calculate the interquartile range of the following data: 17, 18, 18, 19, 20, 21, 21, 23, 25

• 3

• 8

• 4

• 5