Question: A textbook publishing company has compiled data on total amual sales of its business textbooks for the preceding eight years: a-2. Forecast the preceding eight

A textbook publishing company has compiled data

A textbook publishing company has compiled data on total amual sales of its business textbooks for the preceding eight years: a-2. Forecast the preceding eight years, and determine the forecast errors. (Negative answers should be indicated by a minus sign. Do not round intermediate calculations and round your final answer to 2 clecimal places.) a-3. Construct 2s control limits. (Round the final answer to 2 decimal places.) b. Using the model, forecast textbcok sales for each of the next five years. (Round the final answers to 1 decimal place.) c. Suppose actual sales for the next five years turn out as follows: Calculate the forecast errors for years 9 to 13. Is the forecasting process in contror

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