Which group of citizens are most likely to be oversampled in an opinion poll?
A. Older Men
B. Older Women
C. Younger Men
D. Younger Women
E. Everyone, as all are eager to give their opinion to pollsters
The most likely answer to this is that older women are more likely than any of the other groups to be overrepresented in opinion polls. This is because most opinion polls still tend to be conducted by calling landline telephones (using random number dialing). Older women are more likely to be at home and willing to talk to opinion pollsters.
The main possible source of bias in opinion polls today is the problem of nonresponse. It is not as easy as it once was to get people to answer the phone when pollsters call and it is not as easy as it once was to get them to actually go through with the whole survey if they do answer. These problems are generally less common among older women. Therefore, they can tend to be oversampled in opinion polls.