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 17 exams with the following results:
The calculated F ratio is
| Mean Grade | Standard Deviation | |
| Professor 1 | 78.4 | 12.7 |
| Professor 2 | 75.3 | 6.8 |
Solution
F= s1^2/s2^2
= 12.7^2/6.8^2
=3.488106
Answer: 3.488
