The range rule of thumb is only an approximation and should only be used when the distribution of data
values is unimodal and roughly symmetric.

Question

Quizplus · Accepted Answer

The range rule of thumb is designed to estimate the standard deviation of a data set based on the range, but this approximation is only valid for unimodal and roughly symmetric distributions. If the distribution is skewed or has multiple peaks, the range rule of thumb will not be accurate.

The Range Rule of Thumb Is Only an Approximation and Should