Box Plots

Karen constructed the box-and-whisker plot below to show information about her first semester scores.

What was Karen's median test score?

• 70

• 85

• 90

• 95

What is the median?

• 62
• 58
• 66
• 60

What value is the lower quartile?

• 66
• 58
• 60
• 64

What is the interquartile range (IQR)?

• 4
• 64
• 60
• 8

Which box and whisker plot has the highest median?

• Top plot
• Bottom plot

Which restaurant has a higher median wait time?

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

What is the interquartile range (IQR)?

• 20

• 25

• 30

• 50

What data value is the upper quartile (Q3)?

• 64
• 62
• 66
• 58

Which of the following best describes the process of finding the interquartile range for a set of data?

• Add the biggest and smallest numbers.
• Place the numbers in order from least to greatest and find the middle.
• Find the difference between the maximum and the minimum.
• Subtract Q1 from Q3.

What percentage of the data is between 90 and 140?

• 25 %

• 50%

• 75%

• 100%