1. Test the hypothesis than men smoke more than women at the = 0.10 level.
2. Provide and interpret a 95% confidence interval for the difference in hours worked per week for those who consume caffeine and those who don't.
3. Provide and interpret a 97% confidence interval for the difference in average reaction time between men and women.
4. Test the hypothesis that smokers have a lower average pulse rate than non smokers.
5. Provide and interpret a 90% confidence interval for the difference in proportion of men who consume caffeine vs. women who consume caffeine.
6. Test the hypothesis that women have a lower starting salary than men.