Question: 4. Compute four-period moving average and forecasting errors for the following time series: Period (t): 1 2 3 4 5 6 7 8 9 Value

4. Compute four-period moving average and forecasting errors for the following time series:

Period (t): 1 2 3 4 5 6 7 8 9

Value (Xt): 15 27 20 14 25 11 20 25 18

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