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: What are the degrees of freedom for the numerator of the F ratio?
A)8
B)9
C)10
D)18

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:  What are the degrees of freedom for the numerator of the F ratio?
A)8 
B)9 
C)10 
D)18

Quizplus · Accepted Answer

The degrees of freedom for the numerator of the F ratio can be calculated as the number of groups minus one, which in this case is 2-1 = 1. The degrees of freedom for the denominator can be calculated as the total number of observations minus the number of groups, which is 10-2 = 8. Therefore, the F ratio has 1 degree of freedom in the numerator and 8 degrees of freedom in the denominator. The best choice is B, as it correctly identifies the degrees of freedom for the numerator.

Two Accounting Professors Decided to Compare the Variance of Their