Question: 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

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. 5,3,7,2,8
Coal sales Y. 11,6,10,6,12
Use the least squares regression method to drive a forecasting equation
(d) What are the estimated coal sales if the severity of weather index is 8

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