Question: Problem 3-31 (Static) 42 A textbook publishing company has compiled data on total annual sales of its business texts for the preceding nine years: Year

Problem 3-31 (Static) 42 A textbook publishing company has compiled data on total annual sales of its business texts for the preceding nine years: Year 2 3 4 9 Balen cooup: 40.20 44.50 4800 52.30 5580 57.10 62.40 69.00 13.70 point Click here for the Excel Data File a. Using an appropriate model, forecast textbook sales for each of the next five years. (Round your intermediate calculations to 3 decimal places and final answers to 2 decimal places.) 10 11 12 13 14 Forecast b. Compute +/- 2s control limits for the control chart for forecast errors using just data from the original nine periods. (Round your intermediate calculations to 4 decimal places and final answer to 2 decimal places.) Control limits are c. Suppose actual sales for the next five years turn out as follows: 10 11 12 13 14 TY. 20 82. 10 87.80 90.60 98.90 Is the forecast performing adequately? O Yes OND

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