The Professor's Response

Hi, I'm very, very confused with identifying whether an estimator is biased or unbiased. Can you explain how to identify if its biased or unbiased?

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Professor McGukian

Hi Travis,
This is a really simple idea.  If k is used to estimate A, then k is unbiased as long as the expected value of k is A.  So if E(k) = A, k is unbiased as an estimate of A.  If it were something like, E(k) = A + 6, k would be biased as an estimator of A.  


Professor McGuckian

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