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The arithmetic average of a data set.
found by dividing the sum of the terms in a set by the number of terms in the set.
Examples:
mean of 1 and 3 = (1 + 3)/2 = 2
mean of 1 and 2 = (1 + 2)/2 = 1.5
mean of 9, 10, and 21 = (9 + 10 + 21)/3 = 13.3333333333333333333333333333
mean of 6, 5, and 16 = (6 + 5 + 15)/3 = 24
jawwson