One of the major problems with mail surveys is nonresponse bias. In an effort to minimize this, a researcher decides to limit the sample to his personal friends from whom he is sure to get replies. This is an example of a
A) probability sample.
B) nonprobability sample.
C) random sample.
D) sequential sample.
E) quota sample.

Question

Quizplus · Accepted Answer

This is an example of a nonprobability sample because the researcher is selecting participants based on personal relationships rather than random selection, which does not allow for generalization to the larger population.

One of the Major Problems with Mail Surveys Is Nonresponse