30. The principle of randomness in sampling means that
a. every person should have a known chance, and especially an equal chance, of being sampled.
b. there is no preplanning in the selection process.
c. every person in the target population who is encountered is selected.
d. researchers decide how many persons of certain types they need in the survey.
e. the poll is unscientific.
31. Which of the following best describes sampling error?
a. Any given poll will result in as certain percentage point variation from the true answer as pollsters could not
really interview everyone.
b. Researchers take a random number of people and survey them.
c. Pollsters get a sample of people using demographic or geographical software to yield a high level of accuracy.
d. Researchers take a sample of voters and slant the results in order to influence future polls.
e. Pollsters make up the survey results.
32. Usually, the Gallup and Roper polls interview
a. 3 percent of the U.S. population.
b. about 1,500 individuals.
c. over 100,000 individuals in each random sample for presidential elections.
d. people who have been selected based on their intelligence.
e. using quota samples.
Name: Class: Date:
Chapter_6_Public_Opinion_Political_Socialization_and_the_Media