Homework SourseTwo 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 13 exams with the following results:
What are the degrees of freedom for the numerator of the F ratio?
| Mean Grade | Standard Deviation | |
| Professor 1 | 75.5 | 19.8 |
| Professor 2 | 76.4 | 13.9 |
Solution
df for numerator of F ratio = 13-1 = 12
