To investigate a community’s reading habits, a magazine invites readers to complete and mail in a survey. what is the sampling method?

a. convenience sampling
b. systematic sampling
c. self-selected sampling
d. random sampling

does the sampling method have any bias?

a. yes, because the survey is leading. it suggests that a certain answer is wanted.
b. yes, because the people who respond to the survey may underrepresent the number of readers in the community.
c. no, the sampling method has no bias because part of the population equally represents the entire population.
d. yes, because the people who respond to the survey may overrepresent the number of readers in the community.