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The accompanying data file contains 20 observations for t and yt. Epicture Click here for the Excel Data File The data are plotted below. c-1.

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The accompanying data file contains 20 observations for t and yt. Epicture Click here for the Excel Data File The data are plotted below. c-1. Use the exponential smoothing method to make forecasts with a=0,4. (Do not round intermediate calculations and round final answers to 2 decimal places.)

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