Question: Suppose you use Winter's forecasting method on historical data from Q1 2010 to Q4 2018. You obtain the following data for time t =

Suppose you use Winter's forecasting method on historical data from Q1 2010

Suppose you use Winter's forecasting method on historical data from Q1 2010 to Q4 2018. You obtain the following data for time t = quarter 4 2018: L_t= 1065 T_t = 15 S_t = 0.95 S_{t-1} = 0.9 S_{t-2} = 1.2 S_{t-3} = 1.1 Exponential smoothing parameters: alpha=0.2 beta = 0.3 gamma = 0.2 What is the absolute value of the difference between the forecasts for quarter 2 2020 and quarter 4 2021 with Winter's method?

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