Scenario: Let’s look again at the TimeUse data. For each of the following questions, evaluate the extent to which conditions for inference have been met, and then report on what you find when you use an appropriate technique.

a. Estimate the mean difference in the amount of time men and women spent sleeping in 2003.

b. Estimate the mean difference in time that individuals devoted to e-mail in 2003 versus 2007.

c. What can you conclude about the difference in the mean amount of time spent by women and men socializing on a given day?