A team of community members hopes to use land in a current empty lot for a dog park. To determine if the community generally approves of the use of the lot for a dog park, volunteers survey shoppers leaving a pet store located near the lot. The results show that 83% of the 112 people surveyed approve of the dog park plan. How might the survey results be biased in estimating community support for a dog park?
Answer
A
The team could overestimate community support because some shoppers may choose to not respond to the survey.
B
The survey should show little bias and estimate community support well because a random sample of shoppers was chosen.
C
The team could overestimate community support because those surveyed may be more likely to support a park than the overall community would.
D
The team could underestimate community support because those surveyed may be less likely to support a park than the overall community would.
Explanation
People leaving a pet store are more likely than the community as a whole to own pets or care about places where dogs can play. They may therefore be more supportive of a dog park, making the 83% survey result an overestimate of community-wide support. Choice C describes this sampling bias.
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