[header] How to calculate range [title] List the elements of your data set. [step] To find the range of a set, you'll need to list all of the elements of the set so that you can identify the highest and lowest numbers. Write down all of the elements. 
The numbers in this set are : 20 , 24 , 25 , 19 , 24 , 28 and 14. [substeps] It can be easier to identify the highest and lowest number in the set if you list the numbers in ascending order.