4. ADVANCED TOPIC: Describe the structural model for the analysis of variance, including how each score’s overall deviation from the grand mean can be divided into several components. Explain the logic of the comparison distributions that are used with the two-way analysis of variance. Describe the logic and process for determining the cutoff sample F scores at which each null hypothesis should be rejected. Explain how and why the scores from Steps ❸ and ❹ of the hypothesistesting process are compared. Explain the meaning of the results of these comparisons with regard to the specific research and null hypotheses being tested.