You are asked to test the claim that the average score for all final cegep statistics exams is 71. Rather, you think the average score is different from 71. Here are the data on the collected sample: n = 17, x = 72, and s=15. Use a significance threshold of =0.05 and assume that the score on a final statistical exam is distributed normally. The positive critical value is : The negative critical value is : The statistic of the test is : The conclusion of the test is : A. According to our decision rule and with a threshold of 0.05, we reject the null hypothesis. It is likely that the average score is different from 71. B.According to our decision rule and with a threshold of 0.05, we do not reject the null hypothesis. So we can not say that the average score is different from 71