C3. Public corruption continues to be a concern. Let’s examine data from the U.S.

Department of Justice to explore the variability in public corruption in the years 2010 and 2015. All the numbers below are of those convicted of public corruption.

Source: ProQuest, Statistical Abstract of the United States 2018: The National Data Book, Table 367.

1. What is the range of convictions in 2010? In 2015? Which is greater?

2. What is the mean number of convictions in 2010 and 2015?

3. Calculate the standard deviation for 2010 and 2015.

4. Which year appears to have more variability in number of convictions as measured by the standard deviation? Are the results consistent with what you found using the range?