A textbook publishing company has compiled data on total annual sales of its business texts for the preceding nine years Year 1 2 3 4 5 6 7 8 9 Sales (000) 38 40 44 50 48 00 53 40 56 20 57 10 62 80 68 10 74 80 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 ) Year 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 0 Is the forecast performing adequately Please show calculations in excel

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Question: A textbook publishing company has compiled data on total annual sales of its business texts for the preceding nine years: Year 1 2 3 4

A textbook publishing company has compiled data on total annual sales of its business texts for the preceding nine years:

Year	1	2	3	4	5	6	7	8	9
Sales (000):	38.40	44.50	48.00	53.40	56.20	57.10	62.80	68.10	74.80

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.)

Year	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 0

Is the forecast performing adequately?

Please show calculations in excel.

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