Summary Statistics for a Quantitative Variable

AP Statistics· difficulty 3/5

A fitness app recorded the daily step counts (in thousands) for one user over 30 days. The boxplot summarizes the distribution.

What is the interquartile range (IQR) of the daily step counts?

A
$3 thousand steps$
B
$10 thousand steps$
C
$15 thousand steps$
D
$6 thousand steps$
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Explanation

IQR = Q3 - Q1 = 13 - 7 = 6 thousand steps.

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