The advantage of using the interquartile range versus the range as a measure of variation is
A) It is easier to compute.
B) It uses all the data when computed.
C) It always gives a closer measure of the true variation.
D) It is the more powerful measure of spread.
E) It is less affected by unusual or extreme observations in the data.

Question

Quizplus · Accepted Answer

The advantage of using the interquartile range versus the range as a measure of variation is that it is less affected by unusual or extreme observations in the data. The interquartile range only considers the middle 50% of the data, whereas the range considers all of the data, including outliers. This makes the interquartile range a more robust measure of variation.

The Advantage of Using the Interquartile Range Versus the Range