An early evening television program that discussed the use of "carbon offsets" to reduce the impact on global warming asked its viewers to phone in or e-mail a vote for or against this approach. The next day
The television station reported the vote was 70% in favour of this approach. This type of sampling is
Called:
A) voluntary response sampling
B) simple random sampling
C) probability sampling
D) stratified random sampling

Question

Quizplus · Accepted Answer

This is an example of voluntary response sampling, as the individuals who chose to phone in or email were the ones included in the sample. This type of sampling is not representative of the entire population and is therefore not a reliable method to determine the opinions of the general public.

An Early Evening Television Program That Discussed the Use of "Carbon