Only need Part a and b

Question 1. The sound qualitv for a person listening to a meeting on zoom is measured under 2 factors: Microphone on/off and video onfoff. Each of the four treatments is random Iv applied to zoom calls. Each zoom call is 20 minutes long and each is graded for sound |ilualitv. The higher the number the better the quality. The data from the experiment is below. Sound Quality Microphone 0n Microphone Off Video On 65, 72, T5, 68, 69 84, 7B, 82, 79, 85 Video Off 76, 81, T8, 80, 81 83, 84, 89, 92, 88 Part A. State the model. Part B. Test whether all four treatments have the same group averages. Part C. Use ANOVA to test whether there is evidence of interaction. Part D. Use a contrast to test whether there is evidence of interaction