public function dataProviderForTruncatedMean()
{
return [[[92, 19, 101, 58, 1053, 91, 26, 78, 10, 13, -40, 101, 86, 85, 15, 89, 89, 28, -5, 41], 5, 56.5], [[4, 3, 6, 8, 4, 2, 4, 8, 12, 53, 23, 12, 21], 5, 12.31], [[8, 3, 7, 1, 3, 9], 20, 5.25], [[8, 3, 7, 1, 3, 9], 0, 5.16666667]];
}