The last four weekly values of sales were 80,100,105,and 90 units,respectively.The last four forecasts (for the same four weeks)were 60,80,95,and 75 units,respectively.Calculate the MAD,MSE,and MAPE for these four weeks.

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The Answer of The last four weekly values of sales were 80,100,105,and 90 units,respectively.The last four forecasts (for the same four weeks)were 60,80,95,and 75 units,respectively.Calculate the MAD,MSE,and MAPE for these four weeks.

The Last Four Weekly Values of Sales Were 80,100,105,and 90