D) It is expensive, and you should not apply regression to predict data outside the
boundaries of the data used to develop the regression model.
E) No warnings are given.
Karl Pittman commissioned a research project from the research firm of ADVICE, INC.
The results of the project will be presented in a court case and Karl wonders if the
opposing lawyers in the trial will question whether or not the telephone calls, used to
collect the data, were actually made. Sue Miller, project director at ADVICE, INC., had
thought ahead and verified that the interviews were actually conducted. She used the
standard industry method for verification. Which of the following did she use?
A) use an interviewer only one time
B) call back a sample of the interviewer’s respondents to verify that they were
interviewed
C) have all interviewers take polygraph tests on a regular basis
D) pay interviewers to watch their peers
E) put video cameras in all work stations
A sampling method that separates the population into different subgroups and then
samples one or some of these subgroups is:
A) cluster sampling.
B) simple sampling.