MathPHP\Probability\Distribution\Continuous\NoncentralT::mean PHP 메소드

    public static function mean(int $ν, $μ)
    {
        Support::checkLimits(self::LIMITS, ['ν' => $ν, 'μ' => $μ]);
        if ($ν == 1) {
            return \NAN;
        }
        return $μ * sqrt($ν / 2) * Special::gamma(($ν - 1) / 2) / Special::gamma($ν / 2);
    }