Question 39 10 pts A manager at a car wash company in Missouri wants to measure the effectiveness of price discounts and various types of advertisement expenditure on sales. For the analysis, he uses varying price discounts (DISCOUNT) and advertising expenditures on radio (RADIO) and newspapers (NEWSPAPER) in 40 counties in Missouri. The manager would like to test if the advertising expenditures on radio and newspapers have a statistically signicant inuence on sales. She decides to use the Partial F-test. First, she runs the full model Sales = 60 l ,81 Discount | ,82 Radio | BgNe'wspaper l a The JMP output from the full model is shown below. A Summary of Fit l RSquare 0.640357 RSquare Adj 0.610387 Root Mean Square Error 5.793039 Mean of Response 54.59725 Observations (or Sum Wgts) 40 A Analysis of Variance Sum of Source DF Squares Mean Square l-' Ratio Model 3 2151.1298 717.043 21.3665 Error 36 1208,1348 33.559 Prob > F C. Total 39 33592646 F C. Total 39 3359.2646 <.0001 at significance level select the decision manager should make. o ho : b2="B3" h1 atleast one b is not equal to p-value greater than so we fail reject and conclude that advertising expenditures on radio newspapers do have a significant effect sales. less sales.o of sales>