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Using the Data Shown Below, Compute the Mean Square Error

Question 64

Essay

Using the data shown below, compute the mean square error, mean absolute deviation, and mean absolute percentage error for the forecasts shown.  Month  Forecast Demand  Actual Demand  April 170180 May 225215 June 210200 July 260240 August 200220\begin{array}{|l|c|c|}\hline \text { Month } & \text { Forecast Demand } & \text { Actual Demand } \\\hline \text { April } & 170 & 180 \\\hline \text { May } & 225 & 215 \\\hline \text { June } & 210 & 200 \\\hline \text { July } & 260 & 240 \\\hline \text { August } & 200 & 220 \\\hline\end{array}

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Mean square error =∑ (At - Ft )2 / T = [(180 ...

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