Using the Data Shown Below, Compute the Mean Square Error

question 47

Essay

Using the data shown below, compute the mean square error, mean absolute deviation, and mean absolute percentage error for the forecasts shown.
$$\begin{array} { c c c } \text { Month } & \text { Forecast Demand } & \text { Actual Demand } \\\hline\text { April }& 170 & 180 \\\text { May } & 225 & 200 \\\text { Jure } & 210 & 200 \\\text { July } & 260 & 240 \\\text { August } & 200 & 230\end{array}$$