IQR and Box Plots

True or False
The interquartile range is the difference between the upper quartile (Q3) and the lower quartile (Q1).

• True
• False

Find the interquartile range using the following.
Minimum:  1
Q1:  3
Median:  5
Q3:  7
Maximum:  9

• 8
• 4
• 5
• 10

What data value is the upper quartile (Q3)?

• 64
• 62
• 66
• 58

What is the median?

• 62
• 58
• 66
• 60

What value is the lower quartile (Q1)?

• 66
• 58
• 60
• 64

What is the interquartile range (IQR)?

• 4
• 64
• 60
• 8

Which restaurant has a higher median wait time?

• Lucy's Steakhouse
• Gary's Grill
• They are the same

Use the box plot to answer the question.

• 14
• 18
• 15
• 12

What is the lower quartile (Q1) of the data set?

• 25

• 30

• 26

• 28

Use the box plot to answer the question.

• 25%
• 50%
• 75%
• 100%