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(b) The following table shows the data from 2014 to 2019. Year No. of days with typhoon signals no. 8 or above (3-year moving average)

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(b) The following table shows the data from 2014 to 2019. Year No. of days with typhoon signals no. 8 or above (3-year moving average) 2014 1.67 2015 1.67 2016 3.33 2017 3.33 2018 2.67 2019 1.67 Use a smoothing coefficient of a = 0.8, exponentially smooth the series in the table and obtain a forecast for 2020

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