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:

Mean Grade Standard Deviation

Professor 1 79.3 22.4

Professor 2 82.1 12.0

What is the critical value ofFat the 0.05 level of significance?

Select one:

a. 5.85

b. 5.35

c. 3.18

d. 4.03