Summarize Data Using Measures of Variability

What is the first quartile?

• 48.5

• 67

• 45

• 52

What is the third quartile?

• 71

• 70

• 72

• 67

What is the interquartile range?

• 22.5

• 35

• 60

• 50

What is the range?

• 10

• 12

• 15

• 2 - 12

What is the third quartile?

• 7

• 6

• 8

• 3

Find the IQR (Q3 - Q1) of the data

20, 22, 25, 29, 31

• 30

• 25

• 21

• 9

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

What is the IQR of this data set?

37, 42, 48, 51, 52, 53, 54, 54, 55

• 5

• 6

• 8

• 9

Quartile 3 is the...

• Range

• IQR

• Upper Quartile

• Lower Quartile