Question: Using the data shown below, compute the mean square error, mean absolute deviation, and mean absolute percentage error for the forecasts 1 and 2 shown.

Using the data shown below, compute the mean square error, mean absolute deviation, and mean absolute percentage error for the forecasts 1 and 2 shown. Interpret your result which forecast is better?

Month

Sales (At)

Forecast 1 (Ft)

Forecast 2 (Ft)

Jan

35

30

33

Feb

29

28

32

Mar

39

43

35

Apr

42

40

45

May

51

48

52

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