MathPHP\Probability\Distribution\Continuous\FTest::testPDF PHP Метод

public testPDF ( $x, $d1, $d2, $pdf )

    public function testPDF($x, $d1, $d2, $pdf)
    {
        $this->assertEquals($pdf, F::PDF($x, $d1, $d2), '', 1.0E-5);
    }

FTest