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...

R3

Extracted 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.