Test Statistic 
-In a two-way analysis of variance,there are "a" levels for factor A,"b" levels for factor B,and "r" replications within each of the factor-level combinations,or cells.What are the degrees of freedom for the interaction between factors A and B?
Definitions:
Sexual Orientation
Sexual orientation is a term used to describe an individual's pattern of emotional, romantic, or sexual attraction to others.
Homosexual Woman
A female who is romantically and/or sexually attracted to other females.
Heterosexual Woman
A woman who is sexually attracted to men, contrasting with homosexual, bisexual, or asexual orientations.
Homosexual Man
A man who is emotionally, romantically, or sexually attracted to other men.
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