For the data in the following matrix:   No Treatment Treatment                              Male     8 3 Overall M = 5.5 Female 4 4 Overall M = 4   Overall M = 6 Overall M = 3.5   a. Which two means are compared to determine whether there is a main effect of treatment? b. Which two means are compared to determine whether there is a main effect of gender? c. Which of the following statements is TRUE: There is a main effect of gender, and a main effect of treatment There is a main effect of gender, but no main effect of treatment There is a main effect of treatment, but no main effect of gender There is no main effect of gender, and no main effect of treatment

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