Sunday, December 4, 2011

What is a biased/unbiased estimator?

In terms of statistics. I want to check if something is an unbiased estimator.|||replace the 1/N to 1/N-1 and it is unbiased





KNowldege|||a unbiased estimator is one whose expected value is the actual number being estimated


otherwise it is un biased.





Example when computing the variance of data the formula var = [1/N]sum{xk - xavg}2 is biased





replace the 1/N to 1/N-1 and it is unbiased

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