V. (20 points) 得分 Consider the following time series data. month 1 2 3 4 5 6 7 8 . 8 value 18 16 2018 22 2015 22 a. Deve

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V. (20 points) 得分 Consider the following time series data. month 1 2 3 4 5 6 7 8 . 8 value 18 16 2018 22 2015 22 a. Deve

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V. (20 points) 得分 Consider the following time series data. month 1 2 3 4 5 6 7 8 . 8 value 18 16 2018 22 2015 22 a. Develop the three-month moving average forecasts for this time series. Compute MSE and a forecast for month9. b. Using a=0.2 to compute the exponential smoothing forecasts for the time series. Compute MSE and a forecast for month9. c. Which method appears to provide the better forecast?
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