Unit Test #1 Review

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

11. What percentage of the data is between 90 and 140?

• 25 %
• 50%
• 75%
• 100%

Find the Median

• 98
• 93
• 78
• 85

Find the Maximum

• 14
• 20
• 5
• 12

Keyli gathers the heights of a random sample of six graders and seventh graders and displays the data in box plots. What can she say about the data sets?

• The 6th grade sample has greater variability.

• The 7th grade sample has greater variability.

• The 6th grade sample has the greater median.

• The ranges are equal for both samples.