Population or sample standard deviation — which do I use?

Use population (σ, ÷N) when your data is the entire group; use sample (s, ÷N−1) when it is a sample drawn from a larger population.

Standard Deviation Calculator

Paste a list of numbers to compute the mean, median, variance, range, and both population and sample standard deviation, instantly and locally.

Population or sample standard deviation — which do I use?: Use population (σ, ÷N) when your data is the entire group; use sample (s, ÷N−1) when it is a sample drawn from a larger population.

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