How to solve

e$.$ Calculate the Mean Absolute Deviation $($MAD$)$ for the forecasts made by each technique

in periods $4-6.$ Which forecasting method do you prefer? Using your preferred technique

forecast the demands for the following $2$ months $($months $7-8).(15$ points$)$

Period $4$ Actual Demand $=70$

Period $5$ Actual Demand $=72$

Period $6$ Actual Demand $=75$

$3$ Month Moving Average

Period $4$:

Period $5$:

Period $6$:

Absolute Deviations:

Period $4$: $70-$

Period $5$: $72$

Period $6$: $75$

MAD$=$