Corporate Triple A Bond interest rates for 12 consecutive months are 9.5, 9.3, 9.4, 9.6, 9.8, 9.7, 9.8, 10.5, 9.9, 9.7, 9.6, and 9.6.
a. Develop three- and four-month moving averages for this time series. Which moving average provides the better forecasts? Explain.
b. What is the moving average forecast for the next month?