Question: Question 1 (2 points) Suppose that the last four months of sales were 18, 20, 25, and 30 units, respectively. Suppose further that the last

Question 1 (2 points) Suppose that the last four months of sales were 18, 20, 25, and 30 units, respectively. Suppose further that the last four forecasts were 15, 18, 20, and 31 units, respectively. What is the Mean Absolute Deviation (MAD) of these forecasts? 9.75 2.75 11 2.25

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