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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?

Posted to STATS 1 on Monday, August 19, 2013   Replies: 2

Professor Mcguckian
08/19/2013
5:18 PM EST

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.

Sincerely,

Professor McGuckian

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08/21/2013
6:39 PM EST
I can't believe how quickly this solved my problem. I was struggling with this but after reading the answer and watching the video, it became much clearer. I really appreciate this section of the website Professor. It's good to see that I am not the only one with these questions, and it's even better to see such a helpful response so quickly. Thanks again!