Test the claim that for the population of statistics final exams, the mean score is70using alternative hypothesis that the mean score is different from70.Sample statistics include=19,x=71,and=19.Use a significance level of=0.01.(Assume normally distributed population.) The test statistic is_________ . The positive critical value is_________. The negative critical value is__________. The conclusion is: A.There is not sufficient evidence to reject the claim that the mean score is equal to 70. B.There is sufficient evidence to reject the claim that the mean score is equal to 70.