Mean Absolute Deviation $($MAD$)$

The Via Via Pizza manager wants to test the use of exponential smoothing to see how well the techniques works in predicting customer visits. He guessed that the December visits would total $116$ and suggested an exponential smoothing factor of $\backslash$alpha $=0\mathrm{.}10.$

Absolute

Actual Forecast Deviation $($Forecast Error$)$

Customers with $\backslash$alpha $=0\mathrm{.}10$ for $\backslash$alpha $=0\mathrm{.}10$

December $120116$

January $168$

February $212$

March $190$

Sum of Absolute Deviations $=??????$

MAD $=|$Actual $-$ Forecast$|=??????$

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