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Range Rule of Thumb

Range Rule of Thumb

Author: Katherine Williams

This lesson will explain the range rule of thumb.

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Terms to Know
Range "Rule of Thumb"

In a set of data, the standard deviation is approximately one-fourth the difference between the largest and smallest number in the data set. This rule of thumb is more accurate for larger samples with distributions that are approximately symmetric.

Formulas to Know
Range "Rule of Thumb"

r a n g e space almost equal to space 4 times s tan d a r d space d e v i a t i o n

s tan d a r d space d e v i a t i o n space almost equal to space fraction numerator r a n g e over denominator 4 end fraction