The Great Northwest Outdoor Company is a catalogue sales operation that specializes in outdoor recreational clothing. Demand

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The Great Northwest Outdoor Company is a catalogue sales operation that specializes in outdoor recreational clothing. Demand for its items is very seasonal, peaking during the holiday season and during the spring. It has accumulated the following data for order per €œseason€ (quarter) during the past five years:

The Great Northwest Outdoor Company is a catalogue sales operati

a. Develop a seasonally adjusted forecast model for these order data. Forecast demand for each quarter for 2011 (using a linear trend line forecast estimate for orders in 2011).
b. Develop a separate linear trend line forecast for each of the four seasons and forecast each season for 2011.
c. Which of the two approaches used in parts (a) and (b) appear to be the most accurate? Use MAD to verify yourselection.

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