An advantage of the interquartile range (Q)over the range (R)is that it
A)can be used for nominal level variables.
B)includes the most extreme scores.
C)is based on only the middle 50% of the scores.
D)ignores the first and third quartiles.

Question

Quizplus · Accepted Answer

The interquartile range is based only on the middle 50% of the scores, while the range includes all scores, including the most extreme ones. This means that the interquartile range can be more representative of the distribution as it is not influenced by outliers. The interquartile range can be used with ordinal or interval/ratio level variables. However, the option "ignores the first and third quartiles" is incorrect since the interquartile range is based precisely on the difference between these two quartiles.

An Advantage of the Interquartile Range (Q)over the Range (R)is