Quarterly demand for Ford F150 pickups at a New York autodealer is forecast with the equation:yn = 10 + 3xwhere x = quarters, and:Quarter I of year 1 = 0Quarter II of year 1 = 1Quarter III of year 1 = 2Quarter IV of year 1 = 3Quarter I of year 2 = 4and so on and: yn = quarterly demand The demand for trucks is seasonal, and the indices for QuartersI, II, III, and IV are 0.80, 1.00, 1.30, and 0.90, respectively.Forecast demand for each quarter of year 3. Then, seasonalizeeach forecast to adjust for quarterly variations.

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Quarterly demand for Ford F150 pickups at a New York auto
dealer is forecast with the equation:
yn = 10 + 3x
where x = quarters, and:
Quarter I of year 1 = 0
Quarter II of year 1 = 1
Quarter III of year 1 = 2
Quarter IV of year 1 = 3
Quarter I of year 2 = 4
and so on

and:

yn = quarterly demand

The demand for trucks is seasonal, and the indices for Quarters
I, II, III, and IV are 0.80, 1.00, 1.30, and 0.90, respectively.
Forecast demand for each quarter of year 3. Then, seasonalize
each forecast to adjust for quarterly variations.

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