StandardDeviations.php

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<?php

namespace PhpOffice\PhpSpreadsheet\Calculation\Statistical;

class StandardDeviations
{
    public static function STDEV(...$args)
    {
        $result = Variances::VAR(...$args);
        if (!is_numeric($result)) {
            return $result;
        }

        return sqrt((float) $result);
    }

    public static function STDEVA(...$args)
    {
        $result = Variances::VARA(...$args);
        if (!is_numeric($result)) {
            return $result;
        }

        return sqrt((float) $result);
    }

    public static function STDEVP(...$args)
    {
        $result = Variances::VARP(...$args);
        if (!is_numeric($result)) {
            return $result;
        }

        return sqrt((float) $result);
    }

    public static function STDEVPA(...$args)
    {
        $result = Variances::VARPA(...$args);
        if (!is_numeric($result)) {
            return $result;
        }

        return sqrt((float) $result);
    }
}