# Arithmetic Mean

Arithmetic mean is a synonym for average, i.e., the sum of all values in a list divided by the number of values present.

Arithmetic mean is a high school-level concept that would be first encountered in a probability and statistics course. It is an Advanced Placement Statistics topic and is listed in the California State Standards for Grade 5.

### Prerequisites

Mean: | In statistics, a mean is quantity corresponding to one of possibly several different definitions of the "average" of a set of values, such as the arithmetic, geometric, or harmonic mean. In the absence of additional context, the term "mean" most commnly refers to the arithmetic mean (i.e., the average). |