Sally selects classrooms of first graders to study the effects of teaching styles on math
achievement. This is an example of ________________________.
a) stratified random sampling
b) cluster sampling
c) proportional sampling
d) sampling error
b
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Public opinion research shows that party identification:
a. is difficult for researchers to measure, so little is known about it b. varies from the ages of 18 through 45, but then stabilizes c. forms early in life d. forms later in life after age 30, when a person learns more about how government operates
Which of the following is a method for proposing constitutional amendments?
a. by a majority of voting-age citizens b. by a majority of state governors c. bya two-thirds vote in each house of Congress d. bya two-thirds vote in a special election called for the purpose of voting on the amendment