Repeat Exercise 20.15, using exponential smoothing with w = .4. In exercise 20.15 The following quarterly sales
Question:
In exercise 20.15
The following quarterly sales of a department store chain were recorded for the years 20132016.
a. Calculate the four-quarter centered moving averages.
b. Graph the time series and the moving averages.
Transcribed Image Text:
Year 2014 2013 2015 2016 Quarter 18 33 25 41 22 20 36 33 3 27 38 44 52 29 4 31 26 45
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