- Mean - Glossary Term
The arithmetic mean of a list of numbers is the sum of the data values divided by the number of values in the list.
In everyday language, the arithmetic mean is commonly called the average.
For example, for the following list of five numbers 2, 3, 3, 6, 8 the mean equals
In more general language, the mean of n observations x1, x2, …. , xn is