How does the variability of annual inflation-an indicator of inflation risk-change over time? Graph the percent change from a year ago of the consumer price index (FRED code: CPIAUCSL) since 1990 and visually compare the decades of the 1990s, the 2000s, and the period that began in 2010. 4. Download the data from the graph that you produced in Data Exploration Problem 3. Calculate the standard deviation of the annual inflation rate for the three time periods and compare these results against your visual assessment from Data Exploration
