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- From: mglacy@lamar.ColoState.EDU
- Newsgroups: sci.math.stat
- Subject: Adjusted r-squared as analogous to sample variance estimator
- Message-ID: <Aug20.212648.51218@yuma.ACNS.ColoState.EDU>
- Date: 20 Aug 92 21:26:48 GMT
- Sender: news@yuma.ACNS.ColoState.EDU (News Account)
- Organization: Colorado State University, Fort Collins, CO 80523
- Lines: 15
-
- After following the thread about the approporiate divisor for the
- sample variance, and the comments about the misconceptions and
- mistakes concerning it that are propogated in introductory textbooks,
- I was struck by an inconsistency. While most intro. books make
- considerable noise about the need to use n-1 to make the sample
- variance an unbiased estimator, virtually none of them consider
- the analogous correction to make the sample r-squared an unbiased
- estimator of the population parameter.
-
- Does anyone have any explanation for this inconsistency, other
- than simple error on the part of textbook writers?
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- Mike Lacy Dept. of Sociology Colo. State Univ. Fort Collins CO 80523
- Opinions and truth-claims offered above are mine, not my employer's.
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