Calculate the mad for this forecast

Reference no: EM131057459

Consider the accompanying time series.

a. Forecast the demand for each quarter in Year 4 using multiplicative decomposition.

b. Interpret the meaning of the seasonal components.

c. Calculate the MAD for this forecast.

Year 1		Year 2		Year 3
Quarter	Demand	Quarter	Demand	Quarter	Demand
1	28	1	28	1	27
2	20	2	15	2	15
3	24	3	20	3	19
4	10	4	10	4	6

Reference no: EM131057459

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