Population Standard Deviation
Population standard deviation describes the spread of a complete three-observation set. Unlike variance, it has the same units as the observations.
Population Standard Deviation
Statistics · 3 inputs
How to use this calculator
- Enter first value in number.
- Enter second value in number.
- Enter third value in number.
- Select Calculate and keep the output unit with the answer.
Before you use the answer
Choose the reference quantity before interpreting the number. A ratio, a percentage and a percentage-point difference may use the same observations while answering different questions. For recorded data, keep the original values beside the summary so an unexpected result can be traced back to its inputs.
Do not silently swap population and sample denominators. Their answers differ even for identical observations.
Does it save my inputs?
No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.
Why might a result be approximate?
Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.
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