2. An F value of 2.?5 was obtained when an interaction mean square was divided by an error mean square. The degrees of freedom were 6 and 18. If U. = .05, is the null hypothesis for this interaction mean square (Ho: Interaction is significant]? Explain your answer. 3. Numbers in the cell in the following table are the means based on 8 scores for each cell. Explain if the main effect of A appears to be significant? --_:- 4-. List the assumptions required for a factorial design ANOVA and explain each one