A two factory research is used to evaluate the effectiveness of a new blood pressure medicine. In this two factor study, Factor A is medication vs no medication. Factor B is male vs female. What pattern of results should be obtained if the medication works as predicted?
A. At least one of teh main effects must also be significant.
B. Both of the main effects must also be significant.
C. Neith of the two main effects can be significant
D. The significance of the interaction has no implications for the main effects.