The U.S Bureau of the Census reports that based on data from the American Community Survey in 2012, 3.6 percent of all college graduates between the ages of 25 and 64 were unemployed. A larger percentage of men than women were unemployed: 3.7 percent and 3.5 percent, respectively.

a. Are these point estimates or interval estimates?
b. Is the information given here sufficient for you to construct confidence intervals for the unemployment rate of males and females? Why or why not?