Examples
Examples
Try the starting example
- Dataset
- 2,4,6
- Sample variance
- 4
- Sample standard deviation
- 2
- Population variance
- 2.666667
Try another scenario
- Dataset
- 4,8,12
- Sample variance
- 16
- Sample standard deviation
- 4
- Population variance
- 10.666667
Calculation method
Calculation method
Sample variance
variance(a,true)
Sample standard deviation
sqrt(variance(a,true))
Population variance
variance(a,false)
Symbols and units
- a
- Dataset
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Calculation steps and notation
variance(list, sample): calculate the mean and sum the squared deviations from it. Divide by n−1 when sample is true, or n when false. A standard deviation is the square root of the corresponding variance.
sqrt(x) is the non-negative square root of x.
Assumptions & limits
Assumptions & limits
- Sample variance divides squared deviations by n−1; population variance divides by n. Lists support up to 1,000 finite values.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.