| public dataProviderForPopulationCovariance ( ) |
public function dataProviderForPopulationCovariance()
{
return [[[1, 2, 3, 4], [2, 3, 4, 5], 1.25], [[1, 2, 4, 7, 9, 10], [2, 3, 5, 8, 11, 12.5], 13.29167], [[1, 3, 2, 5, 8, 7, 12, 2, 4], [8, 6, 9, 4, 3, 3, 2, 7, 7], -7.1728]];
}