Quiz: Interquartile Range/Box and Whiskers

Identify the Interquartile Range IQR of the data set.

18, 21,22,24,28,30,31,32,36,37

• 29

• 18

• 10

• 37

What data value is the upper quartile (Q3)?

• 64

• 62

• 66

• 58

Which restaurant has a higher median wait time?

• Lucy's Steakhouse

• Gary's Grill

• They are the same

What is the median of the data?

• 200

• 100

• 90

• 140

What is the interquartile range?

• 4

• 6

• 2

• 8

Here are the masses of 6 children.
16 kg, 18 kg, 20 kg, 24 kg, 25 kg and 29 kg

What is the average or mean mass of the children?

• 22 kg

• 22.5 kg

• 23 kg

• 23.5 kg

Find the IQR using the following data.

50, 60, 82, 86, 94, 110

• 60

• 84

• 34

• 50

A box and whisker plot shows the minimum grade as 65, the maximum grade as 95, the median grade as 80, and the first and third quartiles as 70 and 90, respectively. What is the interquartile range of the grades?

• 15

• 20

• 25

• 30

Which box and whisker plot has the highest median? (top, middle, bottom)

Alex wants to have an average of 90 in her math class On the first 4 assignments she received 95, 85, 75, 100. What must she score on the 5th assignment to get an exact average of 90?

• 85

• 90

• 95

• 100