Question

A time series with forecast values and error terms is presented in the following table. The mean absolute deviation (MAD) for this forecast is ___________.
Month Actual Forecast Error
July 5

Aug 11 5 6.00
Sept 13 6.8 6.20
Oct 6 8.66 -2.66
Nov 5 7.862 -2.86

a) 3.54
b) 7.41
c) 4.43
d) 17.72
e) 4.34

Answer

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