The Consumer Confidence Index (CCI) attempts to measure people’s feelings about general business conditions, employment opportunities, and their own income prospects. The file P14_25.xlsx contains the...

The Consumer Confidence Index (CCI) attempts to measure people’s feelings about general business conditions, employment opportunities, and their own income prospects. The file P14_25.xlsx contains the annual average values of the CCI. Use the moving averages method with a carefully chosen span to forecast this time series in the next two years. Defend your choice of the span used.