A statistic used as an alternative to Average. In a collection of numbers that have been ordered by size,
the Median is the middle value. It is smaller than exactly half of the numbers and larger than the other
half of the numbers. The Median is less distorted by extreme numbers than is 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 median is 10 in this series (the 6th in the series of 11). The average is 14.9 and the mode is 7. For
an even numbered series, such as 12 visits, the median is the average of the middle two numbers.