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: 
What are the degrees of freedom for the numerator of the F ratio?
Definitions:
Chinese Descent
Refers to individuals whose ancestors originated from China, possessing cultural, genetic, or national ties to the country.
European Descent
Referring to people whose ancestral origins are found in Europe.
Ambiguous Faces
Visual stimuli that can be interpreted in more than one way and are often used in psychological experiments to study perception and emotion.
Outgroup Homogeneity
The perception that members of an outgroup are more similar to each other than they actually are, as compared to the ingroup's diversity.
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