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The following quarterly sales of a department store chain were recorded for the years 2010–2013 Year Quarter 2010

 The following quarterly sales of a department store chain were recorded for the years 2010–2013. Year Quarter 2010 2011 2012 2013 1 18 33 25 41 2 22 20 36 33 3 27 38 44 52 4 31 26 29 45 a. Calculate the four-quarter centered moving averages. b. Graph the time series and the moving averages. c. What can you conclude from your time-series smoothing? 20.16 Repeat Exercise 20.15, using exponential smoothing with w = .4. 20.17 Repeat Exercise 20.15, using exponential smoothing with w = .8.

Jun 22 2020 View more View Less

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