MathPHP\Statistics\DescriptiveTest::dataProviderForStandardDeviationUsingPopulationVariance PHP Метод

    public function dataProviderForStandardDeviationUsingPopulationVariance()
    {
        return [[[-10, 0, 10, 20, 30], 10 * sqrt(2)], [[8, 9, 10, 11, 12], sqrt(2)], [[600, 470, 170, 430, 300], 147.32], [[-5, 1, 8, 7, 2], 4.67], [[3, 7, 34, 25, 46, 7754, 3, 6], 2558.580063], [[4, 6, 2, 2, 2, 2, 3, 4, 1, 3], 1.374772708], [[-3432, 5, 23, 9948, -74], 4524.934872]];
    }