Population variance of three values

How to use this calculator

1. Enter first value. Use the unit shown beside the field.
2. Enter second value. Use the unit shown beside the field.
3. Enter third value. Use the unit shown beside the field.
4. Select Calculate and review the result. Select Reset to restore the example inputs.

How the calculation works

((First value-(First value+Second value+Third value)/3)**2+(Second value-(First value+Second value+Third value)/3)**2+(Third value-(First value+Second value+Third value)/3)**2)/3

Worked example

First value = 1; Second value = 2; Third value = 3. Result: 0.666667 squared input units.

Understand your result

Measure squared deviations for a population of three values. The result is expressed in squared input units.

Assumptions and limitations

Divides by three; this is not the sample-variance estimator. Results are rounded for display.

Questions about this tool