Which measure of variability provides the best description of the middle 50% of the distribution?
A) the range.
B) the interquartile range.
C) the variance.
D) the standard deviation.

Question

Quizplus · Accepted Answer

The interquartile range (IQR) is the range of the middle 50% of the distribution. It is calculated as the difference between the 75th percentile (Q3) and the 25th percentile (Q1) of the data. Therefore, the IQR provides the best description of the variability in the middle 50% of the distribution.

Which Measure of Variability Provides the Best Description of the Middle