A car rental agency is in the process of deciding the brand of tire to purchase as standard equipment for its eet. As a part of the decision process, they are interested in studying the treadlil'e of four competing brands (A. H, C and D}. Emed on testing. the rmeareh department determined that each of ve tires of each brand lasted the following number of miles {in 1.13005]: Sample variance 6.5 ELI] 6.5 8.11] Population mean leg #3 For #1: {a} Cmplete the following ANUVA table. SGUHGE 55 BE ME Between Brands Error 6.59 Total {b} Test at the o: = 0.05 level that the four tire brands will have the same average miles of wear. {c} Write a statistical model for this experiment and state assumptions associated with the elements in the model. Estimate all of the parameters in the model. I {d} It is of interest to compare brand {3' with brands A. B... and D. Test Hg : #0 = ea +pe +.uo). Use c = cue. {e} Find a 95% condence interval for PM n3. - {f} It is of interest to compare hrands A, H and D. At the 5% signicance level. can you conclude that the average miles of wear are the same among these three brands