In Exercise 2.24 on page 57, we saw that those with a college degree were much more likely to be employed. The same article also gives statistics on earnings in the US in 2009 by education level. The median weekly earnings for high school graduates with no college degree was $626, while the median weekly earnings for college graduates with a bachelor’s degree was $1025. Give correct notation for and find the difference in medians, using the notation for a median, subscripts to identify the two groups, and a minus sign.

Exercise 2.24

The Bureau of Labor Statistics in the US tells us that, in 2010, the unemployment rate for high school graduates with no college degree is 9.7% while the unemployment rate for college graduates with a bachelor’s degree is only 5.2%. Find the difference in proportions of those unemployed between these two groups and give the correct notation for the difference, with a minus sign. Since the data come from the census, you can assume that the values are from a population rather than a sample. Use the correct notation for population proportions, and use subscripts on the proportions to identify the two groups.