Variance

Measure the population spread of a numeric data set around its mean.

How this calculator works

Enter the values for value, rate (%) and review the units before calculating.

Formula / method

σ² = Σ(x − μ)² ÷ n

Worked example

For 2, 4 and 6, the mean is 4 and the population variance is 2.67.

Assumptions and limitations

The entered list is the complete population rather than a sample.

A population variance is not a substitute for a sample estimate when the list is only a sample.