public static function describe(array $X, array $Y, bool $population = false)
{
return ['cov' => self::covariance($X, $Y, $population), 'r' => self::r($X, $Y, $population), 'R2' => self::R2($X, $Y, $population), 'tau' => self::kendallsTau($X, $Y), 'rho' => self::spearmansRho($X, $Y)];
}