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Multiple Choice

A health psychology researcher randomly selects 400 college students from a university registry to participate in an online survey about sleep hygiene.

  • 250 students click the link, complete, and submit the entire survey.
  • 50 students click the link, read the consent form, but explicitly refuse to participate.
  • 70 students never open the survey email because they no longer use that email address.
  • 30 students start the survey but close their browser after answering only one demographic question.

Based on this study, how many individuals must the researcher classify as survey non-responders?

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Updated 2026-06-07

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Research Methods in Psychology - 4th American Edition @ KPU

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