Assume you are employed by a consumer-products rating service and your assignment is to assess car batteries. For this part of your investigation, you want to determine whether there is a difference in useful life among the top-ofthe-Iine car batteries produced by three manufacturers (A, B, and C). To provide the database for your assessment, you randomly sample four batteries from each manufacturer and run them through laboratory tests that allow you to determine the useful life of each battery. The following are the results given in months of useful battery life: Battery Manufacturer A B C 554445 58 52 52 54 51 5|] 5? 52 49 (a) Use the analysis of variance with a = 0.05 to determine whether there is a difference among these three brands of batteries. (i) Fill in the missing vaiues