Data Variability

The interquartile range (IQR) measures how far the data is spread from the mean.

• true

• false

Which statistic is more resistant to outliers?

• mean

• median

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 1 is the...

• Median

• Mode

• Upper Quartile

• Lower Quartile

Quartile 3 is the...

• Range

• IQR

• Upper Quartile

• Lower Quartile

IQR stands for...

• interquestion rainbow

• inside quick radiation

• interquartile range

• I quit running

What is the Q3 of this data set?

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

• 53

• 53.5

• 54

• 55