a. Construct a time series plot. What type of pattern exists in the data? b. Use a - 0.3 to compute the exponential smoothing values for the time series. c. Use trial and error to find a value of the exponential smoothing coefficient a that results in a relatively small MSE.

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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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The following time series shows te sales of a particular product over the past 12 months.
Month
Sales
Month
Sales
145
140
100
105
7
135
120
8.
9.
10
105
80
100
110
90
11
12
120
a. Construct a time series plot. What type of pattern exists in the data?
b.
Use a = 0.3 to compute the exponential smoothing values for the time series.
Use trial and error to find a value of the exponential smoothing coefficient a that
results in a relatively small MSE.
C.
Transcribed Image Text:The following time series shows te sales of a particular product over the past 12 months. Month Sales Month Sales 145 140 100 105 7 135 120 8. 9. 10 105 80 100 110 90 11 12 120 a. Construct a time series plot. What type of pattern exists in the data? b. Use a = 0.3 to compute the exponential smoothing values for the time series. Use trial and error to find a value of the exponential smoothing coefficient a that results in a relatively small MSE. C.
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