Which of the following politicians is more likely to be assured of getting their legislation passed?

Political action committees (PACs) are an attractive option for campaign contributions because __________

a. they are allowed by law to contribute unlimited sums of money to political candidates b. most other types of contributions were banned by the Bipartisan Campaign Reform Act c. they combine many individual contributions, attracting more attention from members of Congress d. PAC contributions are tax deductible

Suppose you perform an experiment that compares the performance of an experimental group and a control group. You find that the mean of the experimental group is higher than the mean of the control group

Does this prove that the treatment enhanced performance? a. Yes, because the experimental group did better as a whole than the control group b. No, because you must compare variances, not means c. No, because the difference between the group could have occurred by chance, even if it was not very likely (i.e., less than .05) d. Yes, because group averages are the traditional measure to use to compare two groups