Question

# The following time series shows the sales of particular product over the past 12 months (Please...

The following time series shows the sales of particular product over the past 12 months (Please show your works, do not use xlminer, thank you)

 Months Sales 1 105 2 135 3 120 4 105 5 90 6 120 7 145 8 140 9 100 10 80 11 100 12 110

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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