Standard deviation/Definition: Difference between revisions

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The square root of ''variance''.
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A statistical measure for the fluctuation of a random variable about its mean value (the square root of the ''variance'').

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https://en.citizendium.org/wiki/index.php?title=Standard_deviation/Definition&printable=yes
A definition or brief description of Standard deviation.

A statistical measure for the fluctuation of a random variable about its mean value (the square root of the variance).

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