Quarterly sales (in millions of dollars) are available for a large soft-drink company between Q1-94 and Q4-03. That is, starting at Q1-94 (t=1) the data contains sales for 40 consecutive quarters, ending with the most recent quarter Q4-03 (t=40). You are asked to use the data to develop a forecasting model for Q1-04. You define a dummy variable for the first quarter: Q-type1=1 if the quarter number is 1; Q-type1=0 otherwise. Similarly you define dummy variables for the other three quarters. The regression printout below summarizes your model.

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