mean

In mathematics, a measure of the average of a number of terms or quantities. The simple arithmetic mean is the average value of the quantities, that is, the sum of the quantities divided by their number. The weighted mean takes into account the frequency of the terms that are summed; it is calculated by multiplying each term by the number of times it occurs, summing the results and dividing this total by the total number of occurrences. The geometric mean of n quantities is the nth root of their product. In statistics, it is a measure of central tendency of a set of data, that is one measure used to express the frequency distribution of a number of recorded events.