Statistics Dictionary

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Range

The range is a simple measure of variation in a set of random variables. It is difference between the biggest and smallest random variable.

Range = Maximum value - Minimum value

Therefore, the range of the four random variables (3, 5, 5, 7} would be 7 - 3 or 4.

See also:   Statistics Tutorial: Measures of Variability | AP Statistics Tutorial: Measures of Variability