The difference between the first and third quartiles is referred to as the .
A) standard deviation
B) variance
C) interquartile range
D) midrange

Question

Quizplus · Accepted Answer

The difference between the first and third quartiles is known as the interquartile range (IQR). It is a measure of the spread of the middle 50% of a data set, and is therefore a more robust measure of variability than the standard deviation or variance. The midrange, on the other hand, is the average of the maximum and minimum values in a data set, and is not related to quartiles or variability.

The Difference Between the First and Third Quartiles Is Referred