Bias (statistics)
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This article is about bias in the field of statistics. For other uses, see Bias (disambiguation).
In statistics, the term bias is used for describing several different concepts:
- A biased sample is one in which some members of the population are more likely to be included than others.
- The bias of an estimator is the difference between an estimator's expectation and the true value of the parameter being estimated.
- Systematic bias and systemic bias are external influences that may affect the accuracy of statistical measurements.
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