public function dataProviderForConfidenceInterval()
{
return [[90, 9, 36, 80, ['ci' => 15.38, 'lower_bound' => 74.62, 'upper_bound' => 105.38]], [90, 9, 36, 85, ['ci' => 17.27, 'lower_bound' => 72.73, 'upper_bound' => 107.27]], [90, 9, 36, 90, ['ci' => 19.74, 'lower_bound' => 70.26000000000001, 'upper_bound' => 109.74]], [90, 9, 36, 95, ['ci' => 23.52, 'lower_bound' => 66.48, 'upper_bound' => 113.52]], [90, 9, 36, 99, ['ci' => 30.91, 'lower_bound' => 59.09, 'upper_bound' => 120.91]], [90, 9, 36, 99.5, ['ci' => 33.68, 'lower_bound' => 56.32, 'upper_bound' => 123.68]], [90, 9, 36, 99.90000000000001, ['ci' => 39.49, 'lower_bound' => 50.51, 'upper_bound' => 129.49]]];
}
