Question: A forecasting method has produced the following data over the past 4 months shown in the data set. (total of 4 marks) Calculate the mean

A forecasting method has produced the following data over the past 4 months shown in the data set. (total of 4 marks) Calculate the mean absolute deviation (MAD) for the 4 months. (show the details of your calculations) (2 marks) b. Calculate the mean absolute percentage error (MAPE) for the 4 months. (show the details of your calculations) (2 marks) a. Month 1 234 Demand 120 100 150 180 Forecast 110 130 130 160

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