# What is the variance of {-5, 19, -20, 5, 16, -7, 1}?

##### 1 Answer

Population Variance:

Sample Variance:

#### Explanation:

Variance is calculated based on

the sum of

**mean** of the data values.

If the data values represent the entire population

then we calculate the **population variance**

If the data values represent a sample from a larger population

then we calculate the **sample variance** **minus 1**).

We would normally use a spreadsheet or calculator to do this.

Using builtin functions:

Or step-by-step: