Question: Please help me with this. Explanation and formula include please 12.15. The Willow River Mining Company mines and ships coal. It has experienced the following

Please help me with this. Explanation and formula include please

Please help me with this. Explanation and formula

12.15. The Willow River Mining Company mines and ships coal. It has experienced the following demand for coal during the past eight years: Year Coal Sales (tonnes) 1 4260 2 4510 3 4050 4 3720 5 90 6 3470 7 2890 8 3100 a Develop an adjusted exponential smoothing model (a=0.30, B=0.20) and a linear trend line model, and compare the forecast accuracy of the two using MAD. Indicate which forecast seems to be most accurate

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