All visitors to the CNN website are invited to take part in the daily poll.Is the resulting sample likely to be biased?
A) No, this will result in a simple random sample.
B) No, although this sample would not be random, it would definitely be representative of the population.
C) Yes, the sample is likely to suffer from nonresponse and self-selection bias.
D) More information is needed to answer the question.

Question

Quizplus · Accepted Answer

The sample is likely to suffer from nonresponse bias because not all visitors will participate in the poll, and self-selection bias because only visitors who are interested in taking the poll will participate. Therefore, the resulting sample may not be representative of the population.

All Visitors to the CNN Website Are Invited to Take