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Given the following data, what is the exponential smoothing forecast with a = .2 for period 4? Use a nave forecast as your starting

Given the following data, what is the exponential smoothing forecast with a = .2 for period 4? Use a nave forecast as your starting point. Month Demand 1 19 2 20 3 18 4 19 5 17 19 18.96 19.2 18.58

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