Unbiased Estimator

A Unbiased Estimator is an estimator that whose bias is zero.

• AKA: Zero Bias.
• Counter-Example(s):
  • Biased Estimator.
• See: Consistent Estimator, Biased Coin Toss Experiment, Estimator, Estimator Bias.

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References

• (Wikipedia, 2009) ⇒ http://en.wikipedia.org/wiki/Bias_of_an_estimator
  • In Statistics, bias (or bias function) of an Estimator is the difference between this estimator's Expected Value and the true value of the parameter being estimated. An estimator or decision rule with zero bias is called unbiased. Otherwise the estimator is said to be biased. Sometimes the word “biased” is incorrectly used in place of “inconsistent”.

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