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.

Question

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.

Quizplus · Accepted Answer

The Answer of 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.

The Following Data Show the Quarterly Sales of a Major