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1. A firm’s sales for a product line during the 12 quarters of the past 3...

1. A firm’s sales for a product line during the 12 quarters of the past 3 years were as follows:
Quarter Sales Quarter Sales
1 600 7   2,600
2   1,550 8 2,900
3 1,500 9 3,800
4 1,500 10 4,500
5 2,400 11 4,000
6 3,100 12   4,900

a. Determine the forecast for the 13th quarter using the Naïve method.
b. Determine the forecast for the 13th quarter using the moving average k=4.
c. Determine the seasonal index of each quarter, and determine the forecast for the 14th quarter .

Engineering   Civil-Engineering   
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