ADVERT 1.43629 0.149238 9.62 Analysis of Variance Sum of Source Squares D.F. Model 14,123,027 ? Error ? ? C Total 20,222,069 41 (a) Fill out all results in the output denoted by "?". (b) What is the interpretation of [31 in the context presented here ? Be precise. (c) Using the results given, what can you say about the marketing department's claim? Please state the corresponding hypotheses symbolically and test the claim at or = 0.05 level. (d) Obtain a 95% confidence interval for [31. (e) If you test the null hypothesis that [31 = 1 at a = 0.05 level, what will be your conclusion. Please explain your reasoning. (f) Based on the analysis, what is your prediction (estimate) of FBStyles' sales if the advertising expenditures is 5 10,000? (g) Assume that in week 40, the actual sales was observed as $16,505 when the level of advertising expenditures for the week was $10,000. What is the corresponding residual (error) from the regression model for week 40 sales? (h) What is the root mean square error for the model