Interquartile Range Worksheet
A Grade 7 math worksheet focusing on calculating and interpreting the interquartile range of data sets.
Includes
Standards
Topics
Interquartile Range Practice
Name:
Date:
Score:
Read each question carefully and follow the instructions to determine the interquartile range (IQR) for the given data sets. Show all your work.
1. What is the definition of the interquartile range (IQR)?
2. For the data set: 12, 15, 18, 20, 22, 25, 28, 30
a. The first quartile (Q1) is .
b. The third quartile (Q3) is .
c. The interquartile range (IQR) is .
3. Calculate the IQR for the following data set: 5, 8, 10, 12, 15, 16, 18, 20, 22, 25.
4. A smaller IQR indicates that the middle 50% of the data is:
More spread out
Less spread out
Centered around zero
Not applicable
5. The median is always one of the quartiles (Q1 or Q3).
True
False
6. The number of points scored by a basketball team in their last 10 games are: 85, 92, 78, 100, 88, 95, 80, 90, 82, 98. Find the interquartile range of the scores.
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