Question: Problems 16 through 21 are based on the following data. Observations of the demand for a certain part stocked at a parts supply depot during

Problems 16 through 21 are based on the following data. Observations of the demand for a certain part stocked at a parts supply depot during the calendar year 2013 were Demand 89 Month January February March April May June 57 144 221 Month July August September October November December Demand 223 286 212 275 188 312 177 280 16. Determine the one-step-ahead forecasts for the demand for January 2014 using 3-, 6-, and 12-month moving averages. 17. Using a four-month moving average, determine the one-step-ahead forecasts for July through December 2013. 18. Using a four-month moving average, determine the two-step-ahead forecast for July through December 2013. (Hint: The two-step-ahead forecast for July is based on the observed demands in February through May.) 19. Compute the MAD for the forecasts obtained in Problems 17 and 18. Which method gave better results? Based on forecasting theory, which method should have given better results? 20. Compute the one-step-ahead three-month and six-month moving-average forecasts for July through December. What effect does increasing N from 3 to 6 have on the forecasts

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