TERMIUM Plus®

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BIASED ESTIMATOR [1 record]

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Alphabetical list of terms

Record 1 1998-07-23

English

Subject field(s)
  • Probability (Statistics)
CONT

If the mean of the sampling distribution of a statistic equals the corresponding population parameter, the statistic is called an unbiased estimator of the parameter, otherwise it is called a biased estimator.

CONT

A statistic t which is used as an estimator of a parameter that is said to be biased if the mean value of t over all possible samples is not equal to theta.

Key term(s)
  • biassed estimator

French

Domaine(s)
  • Probabilités (Statistique)
CONT

[...] l'erreur commise sur une estimation dépend à la fois de sa variance et de son biais : [...] dans certaines techniques d'échantillonnage, on peut être conduit à préférer un estimateur biaisé à un estimateur sans biais, lorsque la variance du premier est plus faible que celle du second.

Key term(s)
  • estimateur non centré

Spanish

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