Which measure of variability is appropriate when a sample is likely to contain one or several extreme values?
A) The variance.
B) The standard deviation.
C) The interquatile range.
D) The range.

Question

Which measure of variability is appropriate when a sample is likely to contain one or several extreme values? 
A) The variance.
B) The standard deviation.
C) The interquatile range.
D) The range.

Quizplus · Accepted Answer

The interquartile range (IQR) is the best measure of variability when the sample is likely to contain one or several extreme values. This is because the IQR is based on the middle 50% of the data, ignoring the extreme values, and is therefore not affected by them. The variance and standard deviation are heavily influenced by extreme values, while the range is only based on the two extreme values and may not accurately represent the spread of the majority of the data.

Which Measure of Variability Is Appropriate When a Sample Is