Many large cities use taxes on entertainment tickets to pay for improvements to public facilities, like stadiums, arenas, and concert venues. A city council proposal would increase the current ticket tax in order to raise funds for a new public concert hall. Council representatives plan to conduct a survey outside of a large concert in the summer and ask selected adults if they would support an increase in the ticket tax to pay for the new concert hall. Which type of bias will most likely affect the survey results?
Answer
A
This is undercoverage bias because only those attending the concert will have an opportunity to register an opinion.
B
This is response bias because it is likely that many who respond will not provide a truthful opinion of the ticket tax.
C
This is voluntary response bias because many vocal supporters of the ticket tax may demand to register their opinion.
D
This is nonresponse bias because many who are asked about the ticket tax may choose to not provide a response.
Explanation
The survey is conducted outside a concert, so people who attend concerts are much more likely to be included than other adults. Adults who do not attend concerts have little or no chance of being selected, even though they may have opinions about the tax. This is undercoverage bias. The issue is not that selected people refuse to answer or give untruthful answers; the sample leaves out part of the population.
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