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# stats_standard_deviation

(PECL)

stats_standard_deviation -- Returns the standard deviation

## Description

float stats_standard_deviation ( array a [, bool sample] )

Warning
This function is currently not documented; only the argument list is available.

## Parameters

`a`

  Its description

`sample`

  Its description

## Return Values

What the function returns, first on success, then on failure. See also the &return.success; entity

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