QUESTION 6 In a test, the average score is 100 with a standard deviation of 15. You believe that the average score for your class is different from 100. You took a sample of 30 students. The average...

Extracted text: QUESTION 6 In a test, the average score is 100 with a standard deviation of 15. You believe that the average score for your class is different from 100. You took a sample of 30 students. The average score for this group is 140 with a standard deviation of 15. Test the hypothesis that the average score is greater. Use a = .05. The rejection region for the test statistic is... less than -1.959963985 and greater than 1.959963985 less than - 2.045229642 and greater than 2.045229642 O less than - 1.644853627 and greater than 1.644853627 none of the above