biased sample


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biased sample

[bī′əst]
Etymology: OFr, biais, slant; L, exemplum, sample
(in research) a sample of a group in which all factors or participants are not equally balanced or objectively represented.

biased sample

A subset of a population that does not represent—either intentionally or unintentionally—an entire population.

biased sample

In epidemiology or medical research, a sample of a group that does not equally represent the members of the group.
See also: sample
References in periodicals archive ?
In Tables 7 and 8, we can see again that PRIDIT-FRE estimates accurately the population fraud rates with small MSE and the count method estimates the biased sample fraud rates.
Similar to our biases sample experiments before, we create a biased sample of 800 claims with a fraud rate of 15 percent (versus an 8.
Further, we demonstrate that PRIDIT-FRE produces very reliable estimates of the population fraud rate even when only a very small and largely biased sample is available for use.
In addition, the difference in mean ratings for the full sample compared to the biased sample was almost twice as large for those physicians in the lowest satisfaction quartile (.
With respect to selecting respondents to simulate a biased sample, level of satisfaction was the only variable considered in determining likelihood of responding.
To avoid problems of using biased samples, many organizations survey their entire workforce.