Intro to Statistics

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Sampling bias

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Intro to Statistics

Definition

Sampling bias occurs when certain members of a population are systematically more likely to be selected in a sample than others. This results in a sample that is not representative of the population.

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5 Must Know Facts For Your Next Test

  1. Sampling bias can lead to inaccurate conclusions about the population.
  2. Common causes include non-random sampling methods, self-selection, and exclusion of certain groups.
  3. It undermines the validity of statistical inference drawn from the sample.
  4. Detection of sampling bias often requires comparing sample characteristics with known population characteristics.
  5. Mitigating sampling bias involves using random sampling techniques and ensuring all subgroups are adequately represented.

Review Questions

  • What is sampling bias and how does it affect statistical analysis?
  • Name two common causes of sampling bias in data collection.
  • How can researchers mitigate the effects of sampling bias in their studies?

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