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 is the calculated F ratio is ?
| Mean Grade | Standard Deviation | |
| Professor 1 | 79.3 | 22.4 |
| Professor 2 | 82.1 | 12.0 |
Select one:
a. 3.48
b. 5.35
c. 3.18
d. 1.87
e. 1.87
as we know that calculated F ratio =ratio between variance of two samples
therefore calculated F ratio =(22.4/12)2 =3.48
option a is correct
Two accounting professors decided to compare the variance of their grading procedures. To accomplish this, they...
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 At the 2% level of significance, what is the decision? Multiple Choice A) Reject the null hypothesis and conclude the variances are different. B) Fail to reject the null hypothesis and conclude the variances are different. C) Reject the null hypothesis and...