Question: The Consumer Price Index CPI which is published by the

The Consumer Price Index (CPI), which is published by the U. S. Bureau of Labor Statistics, is a measurement that reflects changes in consumer prices over time. The following data show the CPI over a 10- year period using 1982 as the base year with the CPI = 100. These data can also be found in the Excel file CPI.xlsx.
a. Forecast the CPI for 2013 using exponential smoothing with trend adjustment, and set α = 0.3 and β = 0.5.
b. Calculate the MAD for the forecast in part a.

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