MCordingley\Regression\StatisticsGatherer\Linear::getSumSquaredTotal PHP Метод

    private function getSumSquaredTotal() : float
    {
        if (is_null($this->sumSquaredTotal)) {
            $average = array_sum($this->observations->getOutcomes()) / count($this->observations->getOutcomes());
            $this->sumSquaredTotal = static::sumSquaredDifference($this->observations->getOutcomes(), $average);
        }
        return $this->sumSquaredTotal;
    }