Question: I JUST NEED HELP WITH PARTS 'D' AND 'E'! Please and Thank you! 18. New car sales for a dealer in Cook County, Illinois, for

I JUST NEED HELP WITH PARTS 'D' AND 'E'! Please and Thank you!

I JUST NEED HELP WITH PARTS 'D' AND 'E'! Please

18. New car sales for a dealer in Cook County, Illinois, for the past year are shown in the following table, along with monthly indexes (seasonal relatives), which are supplied to the dealer by the regional distributor. Month Units Sold Index 640 Jan. Feb Mar. 648 630 0.80 0.80 0.70 0.94 761 0.89 Apr. May Jun. Jul. 735 850 765 805 840 1.00 0.90 1.15 Aug Sept. Oct. Nov. 828 840 800 1.20 1.20 1.25 Dec 1.25 a. Plot the data. Does there seem to be a trend? 6. Deseasonalize car sales. c. Plot the deseasonalized data on the same graph as the original data. Comment on the two graphs. d. Assuming no proactive approach on the part of management, discuss (no calculations necessary) how you would forecast sales for the first three months of the next year. e. What action might management consider based on your findings in part b

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