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2 Use two-month moving average and use trend projection method to forecast the coal sales. Based on the analysis in part (a) and (b),

2 Use two-month moving average and use trend projection method to forecast the coal sales. Based on the analysis in part (a) and (b), which method moving average or trend projection provides the better forecast? Explain. Weather Index X Coal sales (Millions of Tons) Y 5 3 7 2 8 11 6 10 6 12

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