A statistic calculated by summing a set of data values and dividing by the number of values. Used to measure the centre of a sample of variable data.
data values: 2, 5, 6, 4, 9, 3, 7, 8
sum of data values = 44
number of values = 8
average = 44 / 8 = 5.5
It can also denote the median, the mode, the geometric mean, and weighted means, among other things.