7. When people who were selected to participate in a survey do not complete the survey,
and these people differ in important ways from people who did fill out the survey, we say
that the results of the survey have:
a. nonresponse bias.
b. nonsystematic error.
c. interviewer error.
d. random sampling error.
e. interviewer bias.
8. When 120 people are asked to participate in a survey study, but only 30 of them actually
fill out the survey, the refusal rate for this survey is:
a. 120 percent.
b. 75 percent.
c. 25 percent.
d. 15 percent.
e. 30 percent.
9. When an interviewer asks a college business major if he reads The Wall Street Journal
every day and the students says: “Yes,” but, in reality, the student rarely reads this
newspaper, what type of error has occurred?
a. Random sampling error
b. Surrogate error
c. Nonresponse bias
d. Deliberate falsification
e. Selection error