This information is for problems 7 – 14:
Two economics professors decided to compare the variance oftheir grading procedures. To accomplish this, they each graded thesame 10 exams with the following results:
                                                MeanGrade                      StandardDeviation
ProfessorWelker            83.6                                                        21.6
ProfessorAckerman       79.7                                                        12.0
At the 0.01 level of significance, what is yourconclusion?
| a. | Reject the null hypothesis and conclude the variances aredifferent. |
| b. | Fail to reject the null hypothesis and conclude the variancesare different. |
| c. | Reject the null hypothesis and conclude the variances are thesame. |
| d. | Fail to reject the null hypothesis and conclude the variancesare the same. |
| e. | Determine the test results are inconclusive. |
This information is for problems 7 – 14:
Two economics professors decided to compare the variance oftheir grading procedures. To accomplish this, they each graded thesame 10 exams with the following results:
                                                MeanGrade                      StandardDeviation
ProfessorWelker            83.6                                                        21.6
ProfessorAckerman       79.7                                                        12.0
At the 0.05 level of significance, what is yourconclusion?
| a. | Reject the null hypothesis and conclude the variances aredifferent. |
| b. | Fail to reject the null hypothesis and conclude the variancesare different. |
| c. | Reject the null hypothesis and conclude the variances are thesame. |
| d. | Fail to reject the null hypothesis and conclude the variancesare the same. |
| e. | Determine the test results are inconclusive. |
