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: The calculated F ratio is
A)3.484
B)1.867
C)3.18
D)5.35

Question

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:  The calculated F ratio is
A)3.484 
B)1.867 
C)3.18 
D)5.35

Quizplus · Accepted Answer

To calculate the F ratio, we need to use the formula F = s1^2/s2^2, where s1 is the variance of the first sample and s2 is the variance of the second sample. We can calculate the variances using the VAR.S function in Excel, which gives us s1^2 = 68.3 and s2^2 = 19.6. Plugging these values into the formula gives us F = 68.3/19.6 = 3.484, which is closest to choice A. Therefore, the best choice is A.

Two Accounting Professors Decided to Compare the Variance of Their