The interquartile range is
A)the 50th percentile
B)another name for the variance
C)the difference between the largest and smallest values
D)the difference between the third quartile and the first quartile

Question

Quizplus · Accepted Answer

The interquartile range (IQR) is defined as the difference between the third quartile (Q3) and the first quartile (Q1) of a dataset. It is a measure of the spread or dispersion of the middle 50% of a dataset and is used as a more robust alternative to the range, which is sensitive to outliers. Option A is incorrect because the 50th percentile is the median, which is not the same as the IQR. Option B is incorrect because the variance is a measure of the spread of the entire dataset, while the IQR only considers the middle 50%. Option C is incorrect because the difference between the largest and smallest values is the range, which is not the same as the IQR.

The Interquartile Range Is