Explanation:
To find the mean, add together all of the numbers in your data set. Then divide that sum by the number of addends.
To find the median, you have to list the numbers in your data from least to greatest and start crossing off numbers untill you have the middle number.
Ex) 2, 3, 4, 5, 6, 7, 8 [5 is the median]
To find the range, subtract the greatest number and the lowest number in your data