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.

Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.