Question: 4. Using the following data, compute the exponential forecasts using a= 0.3 but use MAD as a tracking signal. Whenever the MAD exceeds 50, switch

4. Using the following data, compute the exponential forecasts using a= 0.3 but use MAD as a tracking signal. Whenever the MAD exceeds 50, switch to a= 0.8, and when the MAD is less than or equal to 50, return to a= 0.3.

Quarter Year I II III IV 2005 2006 28 70 160 110

Quarter Year I II III IV 2005 2006 28 70 160 110 200 90 120 60 110 2007 100 190 150 300 2008 270 350 320

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