(Answered) Exponential smoothing method

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Question: An exponential smoothing model is being used to forecast a time series, with smoothing constant, α = 0.3. If the forecast of the value of the time series for time period 12 is 16.2 and the forecast error for time period 12 is 39, find the forecast for time period 13 using the exponential smoothing method. Round your answer to 1 decimal place. Provide your rationale and any supporting data.

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