PhpBench\Tests\Unit\Math\StatisticsTest::testStdev PHP Метод

    public function testStdev()
    {
        $this->assertEquals(1.4142, round(Statistics::stdev([1, 2, 3, 4, 5]), 4));
        $this->assertEquals(17.2116, round(Statistics::stdev([13, 23, 12, 44, 55]), 4));
        $this->assertEquals(0, round(Statistics::stdev([1]), 4));
        $this->assertEquals(0, round(Statistics::stdev([1, 1, 1]), 4));
        $this->assertEquals(2.47, round(Statistics::stdev([2, 6, 4, 1, 7, 3, 6, 1, 7, 1, 6, 5, 1, 1], true), 2));
    }