Essay
The following data show the quarterly sales of a major auto manufacturer (introduced in exercise 4) for the years 8 through 10. 
a.Compute the four-quarter moving average values for the above time series.
b.Compute the seasonal factors for the four quarters.
c.Use the seasonal factors developed in Part b to adjust the forecast for the effect of season for year 9.
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a.180.00, 188.75, 201.25, 217....View Answer
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