public function dataProviderForCDF() { return [[2, 1, 0.5, 0.75], [2, 1, 0.4, 0.84], [6, 2, 0.7, 0.07047], [8, 7, 0.83, 0.7747708], [10, 5, 0.85, 0.009874091], [50, 48, 0.97, 0.4447201], [5, 4, 1, 0.0], [12, 4, 0.2, 0.92744]]; }