Two accounting professors decided to compare the variance of

Two accounting professors decided to compare the variance of their grading procedures. To accomplish this, they each graded the same 10 exams, with the following results: Professor 1 - 79.3 (Mean) and 22.4 (standard dev) and Professor 2 - 82.1 (Mean) and 12.0 (standard dev)

A. What are the degrees of freedom for the numerator of the F ratio? (9)

B. What are the degrees of freedom for the denominator of the F ratio? (9)

C. What is the critical value of F at the 0.05 level of significance?

D. The calculated F ratio is __(3.4844)_.

E. At the 5% level of significance, what is the decision regarding the null hypothesis?

-Reject the null hypothesis and conclude the variances are different.

-Fail to reject the null hypothesis and conclude no significant difference in the variances.

-Reject the null hypothesis and conclude the variances are the same.

-Fail to reject the null hypothesis and conclude the variances are the same.

*Please provide explanation*

Solution