stats_standard_deviation

stats_standard_deviation

(PECL stats >= 1.0.0)

stats_standard_deviation — Returns the standard deviation

Description

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

Returns the standard deviation 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 standard deviation on success; FALSE on failure.

Errors/Exceptions

Raises an E_WARNING when there are fewer than 2 values in a.

← stats_skew

stats_stat_binomial_coef →

 © 1997–2017 The PHP Documentation Group

Licensed under the Creative Commons Attribution License v3.0 or later.

https://secure.php.net/manual/en/function.stats-standard-deviation.php