To overcome the effects of outliers on the range for a set of data, one could instead calculate the ______.
A) interquartile range
B) standard deviation
C) variance
D) mean

Question

Quizplus · Accepted Answer

The interquartile range (IQR) is a measure of variability that is not affected by outliers. It is calculated as the difference between the third quartile (Q3) and the first quartile (Q1) of the data. This measure only takes into account the middle 50% of the data, ignoring the extreme values. Therefore, it is a better measure of spread for skewed data or data with outliers. The standard deviation and variance are both affected by outliers, while the mean can be heavily influenced by extreme values.

To Overcome the Effects of Outliers on the Range for a Set