The range is the simplest measure of variability within a data set. It is calculated as the difference between the largest data value and the smallest data value. Since only these two values are used, the range can be influenced by extreme values. The original data is given below. 22 21 20 15 30 34 23 21 To more easily see the smallest and largest values, order the data from smallest to largest. 15 21 21 22 23 30 Find the range of the data. range = largest value smallest value