median

The middle value in a set of numbers arranged in increasing order. If there is an even number of values, then the median is the average of the middle two values. For example, the median of the set {10, 12, 14, 19, 20} is 14. The median of the set {2, 3, 4, 6, 8, 9} is 5, which is the average of 4 and 6.