Standard Deviation Calculator

Math Calculators

Calculate population and sample standard deviation.

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Sample SD
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Population SD

About This Tool

Compute standard deviation, variance, and mean for any dataset. Supports both sample and population calculations for statistical accuracy.

Frequently Asked Questions

Standard deviation is a measure of the amount of variation or dispersion of a set of values.

Sample SD is used for a subset of a population (divides by n-1), while Population SD is for the entire dataset (divides by n).

A high standard deviation indicates that the data points are spread out over a wider range of values from the mean.

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