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QUESTION
The first column of the following data refers to the months. The second column is the monthly demand of a particular product.
The first column of the following data refers to the months. The second column is the monthly demand of a particular product. The third column contains the forecast for that period based on a specific method:
t At Ft
1 15 17
2 19 15
3 11 13
4 14 11
5 15 18
6 16 9
The mean absolute deviation (MAD) is equal to:
