Question: The table below contains demand and forecasts for 5 periods. Determine the accuracy of the forecast by calculating average forecast error, MAD, MSE and MAPE.

The table below contains demand and forecasts for 5 periods. Determine the accuracy of the forecast by calculating average forecast error, MAD, MSE and MAPE. Does this forecasting technique typically result in an overage or underage?

Period	Actual	Forecast
1	152	149
2	161	159
3	160	166
4	155	161
5	150	148

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