You have been asked to develop a model using multiple
You have been asked to develop a model using multiple regression that predicts the retail sale of beef using time-series data. The data file Beef Veal Consumption contains a number of variables related to the beef retail markets beginning in 1935 and extending through the present. The variables are described in the Chapter 13 appendix.
a. Prepare a model that includes a test and adjustment for serial correlation. Discuss your model and indicate important factors that predict beef sales.
b. Prepare a second analysis, but this time include only data beginning in the year 1980.
c. Compare the two models estimates in a and b.
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