A statistical term referring to sum of a measure divided by the number of items measured. Also called
the average. For example, for a series of 11 visits consisting of 3, 7, 7, 7, 8, 10, 15, 22, 25, 25, and 35
page views each, the mean number of page views is 14.9 (total 164 divided by 11), the median is 10
(the 6th in the series of 11) and the mode is 7.