Least Square Estimators - Estimator of Variance, sigma^2

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You are an absolute BOSS. The ONLY yt content creator with topics that touch right below the surface of introductory econometrics! I can NOT express ENOUGH how much your videos - especially the proofs of summation formulaes- and the demonstrations of the calculation of estimated variances have helped me. I appreciate SO MUCH that you do not use fancy verbatim, unlike my current professor, and you get straight to the POINT.

hime
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Wow, you explained so well. Thanks much!

elvinphilip
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Very helpful
Thanks for uploading the video😊

lalittilak
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Is this a biased or unbiased estimate?

pndawan