Range

The distance between the lowest and highest values in a data set. In the data set {1,2,3,4,5} the range is 4. In the data set {1,2,3,10} the range is 9. In the data set {1,1,1,1,1} the range is 0. When the range of a data set is 0, we know that all of the values in the data set must be the same value.