SOLUTION: ``Two accounting professors decided to compare the variation of their grading procedures. To accomplish this they each graded the same 10 exams with the following results:

Question 452529: ``Two accounting professors decided to compare the variation 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
Answer these questions.
What is H0?
A)
B)
C)
D)
What is H1?
What are the degrees of freedom for the numerator of the F ratio?
What are the degrees of freedom for the denominator of the F ratio?
What is the critical value of F at the 0.01 level of significance?
The calculated F ratio is?
At the 1% level of significance, what is the decision?
A) Reject the null hypothesis and conclude the variance is different.
B) Fail to reject the null hypothesis and conclude the variance is different.
C) Reject the null hypothesis and conclude the variance is the same.
D) Fail to reject the null hypothesis and conclude the variance is the same.
''.

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
``Two accounting professors decided to compare the variation 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
Answer these questions.
--------------------
What is H0
Ho: v1-v2 = 0
Ha: v1-v2 is not 0
------------------
What are the degrees of freedom for the numerator of the F ratio?:: 9
------------------
What are the degrees of freedom for the denominator of the F ratio?:: 9
------------------------------
What is the critical value of F at the 0.01 level of significance?
The calculated F ratio is? ::: 3.1789
------------
test statistic: F = 22.4^2/12^2 = 3.4844
---------------------------------------------
At the 1% level of significance, what is the decision?::: A
----------
A) Reject the null hypothesis and conclude the variance is different.
B) Fail to reject the null hypothesis and conclude the variance is different.
C) Reject the null hypothesis and conclude the variance is the same.
D) Fail to reject the null hypothesis and conclude the variance is the same.
==============
Cheers,
Stan H.
==============

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