The Actual and Forecast Values of a Time Series Are

question 55

Essay

The actual and forecast values of a time series are shown below. $$\begin{array} { | c c | } \hline \text { Actual values } y _ { t } & \text { Forecast values } F _ { t } \\\hline 2325 & 2330 \\2555 & 2595 \\2835 & 2860 \\3185 & 3125 \\3510 & 3390 \\\hline\end{array}$$ a. Calculate the mean absolute deviation (MAD).
b. Calculate the sum of squares for forecast error (SSE).

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