Question: Based on your work in the previous three problems, a. Determine a seasonally adjusted linear trend forecasting model. Compare this model with an unadjusted linear

Based on your work in the previous three problems,
a. Determine a seasonally adjusted linear trend forecasting model. Compare this model with an unadjusted linear trend model. Use both models to forecast Tran€™s sales for period 49.
b. Which of the two models developed has the lower MAD and lower MSE ?
Store, which has maintained monthly sales records for the past 48 months, with the following results:

1457(6) 4( 855 S( 2 7 7 4 6 4 35 4 4 3 3 2 3 3 3 3 3 3 3 3 1-901 678 7 6 933 1469 () 1 2 3 4 5 6 7 8 Month Sales (S) 32.400 35,600 31,200 34.600 36.800 35,700 Month Sales (S) 37.500 40,000 43.200 46.700 50.100 52,100 37 (Jan) 38 39 43 46 48

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