The average mat exam score for the statistics course is 75%. A proressor wants to see in the average nimat exam score for students who are given colored pens on the first day of class is different. The final exam scores for the 15 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 68, 76, 63, 85, 61, 52, 53, 56, 64, 87, 63, 54, 56, 67, 79 What can be concluded at the the a = 0.01 level of significance level of significance? a. For this study, we should use t-test for a population mean b. The null and alternative hypotheses would be: Ho: B B 75 : # 75 BB