Arithmetic & Basics
Basic

Average (Mean)

Add all values and divide by how many there are.

Formula

average=sum of valuesnumber of values\text{average} = \frac{\text{sum of values}}{\text{number of values}}

Variables

sumTotal of all values
nHow many values

Example

(4+8+6)/3 = 6

Did You Know?

The average can be a value that no member of the data set actually has — the "average" family famously has 2.4 children.

averagemeanbasics