Difference between the extreme values taken by a quantitative statistical attribute.

- The number of results does not factor into the calculation of the range.
- The calculation of the range is important for determining the amplitude of the statistical classes in a distribution.

### Examples

- Consider this distribution: 3, 4, 7, 9, 12, 15, 17.
- The range E is 14, because: E = 17 – 3 = 14.
- In a test, if the results are measured in increments from 64% to 99%, then we say that the range E is 35, because: E = 99 – 64 = 35.