The values of Alabama building contracts (in millions of dollars) for a 12-month period follow:
240 350 230 260 280 320 220 310 240 310 240 230
a. Construct a time series plot. What type of pattern exists in the data?
b. Compare a three-month moving average forecast with an exponential smoothing forecast. Use α=0.4.Which provides the better forecasts based on MSE?
c. What is the forecast for the next month?
d. Explain how you would find the optimum level of α for this data.
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