Identify the type of sampling bias guaranteed to occur in each of the sampling schemes, based on the information provided. Some sampling schemes may incur multiple types of bias. A political poll is conducted by contacting people on landline phones. The pollsters
did not keep track of how many people they contacted who did not respond.

A political poll is administered by contacting people on landline phones. The pollsters
contacted 5000 households, and 1255 individuals agreed to speak with the caller.

A political poll is conducted by asking the listeners of a radio program to call in.

A political poll asks the question, "If you found out that Candidate A was given
a large sum of money by Special Interest Group B, would that change your opinion
of how hypocritical Candidate A is?"

Answer Bank
1) Self - Selection
2) Response
3) undercoverage
4) nonresponse