Question: 8.19. For the following data, calculate the mean absolute deviation. Period Forecast Actual Demand Deviation Absolute Deviation 1 100 105 5 5 2 105 95

8.19. For the following data, calculate the mean absolute deviation.
Period Forecast Actual Demand Deviation Absolute Deviation
1 100 105 5 5
2 105 95 10 10
3 110 90 20 20
4 115 135 20 20
5 120 105 15 15
6 125 120 5 5
Total
Is there any bias error (Yes/No)? Why?
MAD 17

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