public function dataProviderForCohensD()
{
return [[3, 3, 1.5811388300842, 1.5811388300842, 0], [3, 4, 1.5811388300842, 1.5811388300842, -0.6324555320336718], [6, 4.9166666666667, 1.5954480704349, 2.5030284687058, 0.5161479565960618], [40, 57.727272727273, 21.275964529644, 30.763910379179, -0.6702470286592815], [6.7, 6, 1.2, 1, 0.6337502222976299], [9, 3.5, 1.2, 1.5, 4.049155956077707], [108, 118, 15, 14.83239697419133, -0.6704015]];
}