Question

select the correct answer.

a school board is interested in whether high school students would like to shift the school day forward by 30 minutes. they decide to conduct a survey and randomly select students who are involved in extracurricular activities.

which statement is true?

the survey results are not at risk for any bias.
the survey results are most at risk for undercoverage.
the survey results are most at risk for nonresponse bias.
the survey results are most at risk for students not being able to answer honestly.

Explanation:

Analyze the target population and sampling frame

The target population is all high school students. The sampling frame is restricted only to students involved in extracurricular activities.

Identify the type of sampling bias

By selecting only students in extracurricular activities, students who do not participate in extracurricular activities are completely excluded from the sample. This systematic exclusion of a segment of the population is known as undercoverage.

Evaluate the given options

The survey is at risk for undercoverage because it leaves out students who are not involved in extracurricular activities, whose opinions on shifting the school day might differ significantly.

Answer:

• The survey results are not at risk for any bias.
• The survey results are most at risk for undercoverage. (Correct answer)
• The survey results are most at risk for nonresponse bias.
• The survey results are most at risk for students not being able to answer honestly.