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Compute three-period moving average and forecasting errors for the following time series: Period (t): 2 3 4 5 6 7 8 9 Value (Xt): 15

Compute three-period moving average and forecasting errors for the following time series: Period (t): 2 3 4 5 6 7 8 9 Value (Xt): 15 27 20 14 25 11 20 25 18

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