Question: Refer to the Hudson Marine problem in exercise 53. a. Compute the centered moving average values for this time series. b. Construct a time series

Refer to the Hudson Marine problem in exercise 53.
a. Compute the centered moving average values for this time series.
b. Construct a time series plot that also shows the centered moving average and original time series on the same graph. Discuss the differences between the original time series plot and the centered moving average time series.
c. Compute the seasonal indexes for the four quarters.
d. When does Hudson Marine experience the largest seasonal effect? Does this result seem reasonable? Explain.
In Exercise 53

Total Yearly Sales 35 50 75 Year Quarter 1 Quarter 2 Quarter 3 Quarter 4 15 18 26 28 34 36 10 15 4 10 19 24 12 18 21 20 27 4 25 28 30 35 105 110 130 28

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