Returns the variance

# stats_variance

(PECL stats >= 1.0.0)

stats_variance — Returns the variance

### Description

stats_variance(array `$a`, bool `$sample` = `false`): float

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.

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