The internal validity threat known as "history" is a problem for which of the following designs?

a. Nonequivalent comparison group design
b. Interrupted time-series design
c. Regression-discontinuity design
d. None of the above

B

Political Science

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Voter __________ is measured by the number of people who vote in an election, divided by the number of people who were eligible to vote

a. enthusiasm b. malaise c. turnout d. registration

Political Science

Which of the following is an example of police powers?

a. the power to issue tickets for traffic violations b. the power to impeach federal judges c. the power to determine the precious metal content of coins d. the power to impound funds e. the power to commission naval officers

Political Science