12. Test the claim that for the population of statistics final exams, the mean score is 77 using alternative hypothesis that the mean score is different from 77. Sample statistics include n = 27, x =...

Extracted text: 12. Test the claim that for the population of statistics final exams, the mean score is 77 using alternative hypothesis that the mean score is different from 77. Sample statistics include n = 27, x = 78, and s = 18. Use a significance level of a = 0.05. (Assume normally distributed population.) The test statistic is The positive critical value is The negative critical value is The conclusion is A. There is sufficient evidence to reject the claim that the mean score is equal to 77. B. There is not sufficient evidence to reject the claim that the mean score is equal to 77.