Statistic Functions
PHP Manual

stats_variance

(PECL stats >= 1.0.0)

stats_varianceReturns the variance

Description

float stats_variance ( array $a [, bool $sample = false ] )

Returns the variance of the values in a.

Parameters

a

The array of data to find the standard deviation for. Note that all values of the array will be cast to float.

sample

Indicates if a represents a sample of the population; defaults to FALSE.

Return Values

Returns the variance on success; FALSE on failure.


Statistic Functions
PHP Manual