Evaluate the mean absolute deviation or mad for four-period, Ask an Expert

Management Studies

Since May of 2005, the purchase manager at department store has been using the 4-period moving average to forecast sales in next months. Sales data for months of January through July are given in the table below.

Month	Sales
Jan	65
Feb	65
Mar	41
Apr	50
May	63
June	38
Jul	72

Evaluate the mean absolute deviation (or MAD) for four-period moving average forecasts. The forecast values are computed with accuracy of two decimal digits. Identify the MAD as an entire number by rounding.

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Operation Management, Management Studies

Category:- Operation Management
Reference No.:- M914503

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