Michael wants to know what the students at his school think about online testing. He randomly selects 15 students from the computer club and asks each of them 4 questions about online testing. Which of the following describes the most likely cause of statistical bias in the survey results?

Question

A.
The survey included 4 questions.

B.
The students were randomly selected.

C.
The students were members of the computer club.

D.
The survey was given to students at Michael's school.

Answer 1

The most likely cause of statistical bias in the survey results is:

C. The students were members of the computer club.

This choice highlights that the sample is not representative of the entire school population, as the computer club members may have different opinions about online testing compared to students who are not in the club. This can lead to bias in the results, as the sampled group may have specific experiences or perspectives that do not reflect the views of all students.