Two Groups or One?

1. Three situations comparing two proportions are described below. In each case, determine whether the situation involves comparing proportions for two groups or comparing two proportions from the same group.
2. In a taste test, compare the proportion of tasters who prefer one brand of cola to the proportion who prefer the other brand.
3. Compare the graduation rate (proportion to graduate) of students on an athletic scholarship to the graduation rate ofstudents who are not on an athletic scholarship.
4. Compare the proportion of voters who vote in favor of a school budget to the proportion who vote against the budget.