Calculating MAD, MSE, RMSE, MAPE and MPE in Excel

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I am getting different MAD values, can't figure out why? Any feedbacks?

aanchalsharma
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there is an error with your standard error calculation, you should be deducting forecast from actual, as you are measuring how high or low you forecasted, so for period 2 the error value should be 4 and not -4 and period 3 it should show -6 and not 6, its not critical to have this around the right way until you measure the PE/MPE and especially if you are adding a weight such as Sales$ or COGS or Volume etc..

flodareltih