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Boundless Statistics
Sampling
Populations and Samples
Statistics Textbooks Boundless Statistics Sampling Populations and Samples
Statistics Textbooks Boundless Statistics Sampling
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Samples

Samples

Samples

Online and phone-in polls produce biased samples because the respondents are self-selected. In self-selection bias, those individuals who are highly motivated to respond-- typically individuals who have strong opinions-- are over-represented, and individuals who are indifferent or apathetic are less likely to respond.

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    https://www.boundless.com/psychology/psychology-as-science/descriptive-techniques/explanation-random-sampling/ Boundless Learning CC BY.

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  • census
  • population
  • unbiased
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