1.There are about 70 million eligible voters in a society. A public opinion pollster has estimated their probable choices for the next president with a sample of 2,000 randomly selected citizens. In this example, the 2,000 citizens are a __________ and the 70 million eligible voters are a _______.

a.sampling distribution, sample distribution

b.population, cluster

c.cluster, proportion

d.sample, population

2.A researcher tests a theory about sexism by administering a survey to the 200 students in her sociology classes. This sample is best characterized as a

a.cluster sample.

b.stratified random sample.

c.non-probability sample.

d.sampling distribution.

3.Unless a sample is __________, it cannot be used to make accurate generalizations to a population.

a.very large

b.non-probability

c.representative

d.stratified