Question: 1) Given forecast errors of -1, 4, 4, and -3, what is the mean absolute deviation? 2) Which time-series model below assumes that demand in

1) Given forecast errors of -1, 4, 4, and -3, what is the mean absolute deviation?

2) Which time-series model below assumes that demand in the next period will be equal to the most recent period's forecast? (note : its not naive approach)

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