To determine how a city’s residents feel about building a new youth center, a group considers surveying 50 random children at a local elementary school. Why would this result in a biased sample? Select three answers.

The survey aims to represent all of the city’s residents, but sampling only elementary school children leaves out adults, so A is correct. Elementary students may also be more likely than other residents to support a youth center, making the sample unrepresentative (C). The survey also misses children in middle school and high school, who may have different views (E). Randomly selecting students within the elementary school does not fix these coverage problems, and some people having no opinion does not by itself make the sample biased.

AI-written and checked against the verified answer.