## Sample Standard Deviation Definition

A measure of the range of values in a set of numbers. Standard deviation is a statistic used as a measure of the dispersion or variation in a distribution, equal to the square root of the arithmetic mean of the squares of the deviations from the arithmetic mean. Source

## Sample Standard Deviation Formula

$\sigma =\sqrt{\frac{1}{N}\sum _{i=1}^{N}{\left({x}_{i}-\mu \right)}^{2}}.$

## Sample Standard Deviation Calculator

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