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The given information is the quarterly sales of gasoline in the United States (in millions of barrels during part of the 1980s and the 1990s. Estimate the linear trend and use it to forecast sales for the first quarter of 1992. Note: There are two parts to this question. The first answer looks like S = a +b * T where A an B are constants and t is the time period, i.e. t = 17 for the first quarter of 1992. The second answer is the forecast quantity. Second Hint: use Excel.
Time Quantity Time Quantity1988.1 11 1990.1 141988.2 15 1990.2 181988.3 12 1990.3 151988.4 14 1990.4 171989.1 12 1991.1 151989.2 17 1991.2 201989.3 13 1991.3 161989.4 16 1991.4 19
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Wilpen Corporation, a price-setting form, manufactures nearly 80% of all tennis balls purchased in the United States. Wilpen estimates the U.S. demand for its tennis balls by using the linear specifications:
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Solve the forecast model
In Milky Way Galaxy, a class of 2,000 students took a course in Astronomy. The 1st exam scores and final exam percentage reached earth, but transmission broke off after only a dozen students' scores were received.
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