Question: A manager uses a trend equation plus quarterly relatives to predict demand. Quarter relatives are SR1 = 0.9, SR2 = 0.95, SR3 = 1.05, and

A manager uses a trend equation plus quarterly relatives to predict demand. Quarter relatives are SR1 = 0.9, SR2 = 0.95, SR3 = 1.05, and SR4 = 1.1. The trend equation is: Ft = 9 + 4t. Over the past nine quarters, demand has been as follows:

Compute the MAD and tracking signal for each period. (Negative values should be indicated by a minus sign. Round your intermediate calculations and final answers to 3 decimal places.)

Period, t:	Demand:	Forecast	MAD	Tracking Signal
1	14	13
2	18	17
3	20	21
4	22	25
5	28	29
6	30	33
7	36	37
8	42	41
9	45	45

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