Question: 2 3 Year Quarter Q2 Q3 Time (t) 20 points The quarterly sales data (number of copies sold) for a college textbook over the past

2 3 Year Quarter Q2 Q3 Time (t) 20 points The

2 3 Year Quarter Q2 Q3 Time (t) 20 points The quarterly sales data (number of copies sold) for a college textbook over the past 5 years are shown here. The columns for dummy variables Q1, Q2, Q3, and time variable t are already set up. 1 00 OU AWN 5 0 1 0 2 0 0 OOOOO (a) Compute the quarterly forecasts for year 6. 2 0 1 0 O O O O 0000 OWN- (b) Which quarter has the lowest sales level each year? 0 1 0 0 1 3 Sales Q1 1 1860 2 1030 3 2890 4 2750 1 1980 2 990 3 3190 4 2600 1 2040 2 1210 3 3220 4 2880 1 2170 2 1290 3 3470 4 2950 1 2290 2 1500 3 3430 4 2980 0 1 (c) According to your regression equation, what is the expected difference between quarter 3 sales and quarter 4 sales each year? 0 0 0 O O O 0 1 0 4 1 Oolo 0 0 0 WN 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 0 1 0 0 0 1 0 0 10 11 12 13 14 15 16 17 18 19 20 5 V OOOOOOO OOOOOOOOO 0 OOOOO 0 0 1 0 2 WN 3 0 1 4 0 0 0

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