Consider the following table of means for a two-factor between subject ANOVA from the previous question. The grand mean (verify with given data) is 4.5: a1 a2 b1 8 5 b2 4 Which of the following statements is true: There is only an interaction effect. There is a main effect of independent variable B and an interaction effect. There is only a main effect of independent variable A. There is a main effect of independent variable A, a main effect of independent variable A, and an interaction effect. There is a main effect of independent variable A and an interaction effect. There is only a main effect of independent variable B