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@ 2014-06-27T02:40:29Z

<?php
$A = array(9,4,10);

function standard_deviation($A){
	if(is_array($sample)){
		$mean = array_sum($sample) / count($sample);
		foreach($sample as $key => $num) $devs[$key] = pow($num - $mean, 2);
		return sqrt(array_sum($devs) / (count($devs) - 1));
	}
}
?>

Output
Performance
VLD
References
Branches

array_sum: documentation ( source)
pow: documentation ( source)
sqrt: documentation ( source)

preferences:dark modelive preview

31.39 ms | 402 KiB | 5 Q