The range is one of the simpler calculations in describing the distribution of a data set. The range determines the spread of the data and is given by taking the largest value of the data set and the smallest value of a data set and finding the difference between the two.

For example, the data set ${12,14,15,18,23,25,30}$ has the highest data value of 30 and the lowest data value of 12. Hence, the range is just equal to 30 – 12 = 18.