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Sagot :
Answer:
5.5 units
Explanation:
Period Actual Forecast Absolute deviation
1 16 20 4
2 28 16 12
3 20 20 0
4 24 30 6
Total 22
Mean absolute deviation(MAD) = Sum of absolute deviation / Number of periods
Mean absolute deviation(MAD) = 22 / 4
Mean absolute deviation(MAD) = 5.5 units
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