AllEasyToolsLower secondary
Mean, median and deviation
Mean, median and deviation: formula, units and explained result. No account required. Processing stays in your browser.
μ = Σx/n; σ = √(Σ(x−μ)²/n)
Population deviation, not sample deviation. Up to 1000 values. Decimal commas supported.
How to use this calculator
- Identify the quantities and convert them to the units shown.
- Apply the formula first, then compare with the substitution and result.
- Check the assumptions and whether the order of magnitude makes sense.
Levels are approximate topic groupings, not a complete curriculum for every country. Numerical results are rounded and may lose precision for extreme or nearly singular inputs.
A practical example
Use these sample inputs to check the calculation before entering your own values.
- Values separated by semicolons
- 2; 4; 4; 6
Result for this example
- Mean
- 4
- Median
- 4
- Population deviation
- 1.4142135623730951