Question: A manager uses a trend equation plus quarterly relatives to predict demand. Quarter relatives are SR 1 = 0 . 9 , SR 2 =

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 =12+4t. Over the past nine quarters, demand has been as follows:
Period, t: 123456789
Demand: 152025283133394147
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.)

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