shamika conducts a study comparing the performance of individuals in two different statistics classes taking the same quiz. the scores, out of 100, are provided for individuals in each group. class 1: 87, 78, 87, 85, 93, 98, 83, 82, 73 class 2: 87, 86, 92, 90, 90, 91, 89, 78, 76 assume that the conditions for an independent-samples t test are met. given a two-tailed test and an alpha level of 0.05, the critical values for t have an absolute value of