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Could this be something where contacting non-responders or sending out additional questionnaires could skew the results? Maybe non-response is considered part o

Could this be something where contacting non-responders or sending out additional questionnaires could skew the results? Maybe non-response is considered part of a poll and by fighting against that you would somehow be putting your thumb on the scale? I'm not an expert either in statistics or in polling; so I'm just speculating.

dr_orpheus 4y ago
It certainly could and depends on the questions being asked. If you are sending out a questionnaire via email and some of the questions are along the lines of "how many times a day do you check your email?" or "how much time do you spend at your computer?" you could certainly get some skewed results.
baandam 4y ago
Of course, it would not be a random sample if 75% get one questionnaire and 25% get two questionnaires and encouragement.
- ghaff 4y ago
  Probably close enough and potentially closer just sending out one request.
wheelinsupial 4y ago
> I'm not an expert either in statistics or in polling Fortunately for us, the author is :) The author has an outline available for a course on survey sampling for those interested in references and topics to learn more. http://www.stat.columbia.edu/~gelman/surveys.course/surveys_course_outline.pdf http://www.stat.columbia.edu/~gelman/surveys.course/surveys_...