public function dataProviderForTrimean()
{
return [[[155, 158, 161, 162, 166, 170, 171, 174, 179], 166], [[162, 162, 163, 165, 166, 175, 181, 186, 192], 169.5], [[1, 3, 4, 4, 6, 6, 6, 6, 7, 7, 7, 8, 8, 9, 9, 10, 11, 12, 13], 7.25], [[1, 3, 4, 4, 6, 6, 6, 6, 7, 7, 7, 8, 8, 9, 9, 10, 11, 12, 1000], 7.25]];
}