Answer
Nonresponse bias, because people can choose to be in the sample (by completing the survey)
Work Step by Step
Nonresponse bias, because people can choose to be in the sample (by completing the survey)
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.