Talk:Coefficient of multiple correlation

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Problem in the "Definition section"

This section does not provide a definition. It says the coefficient can be calculated by a given formula. The discipline of statistics is confounded by statements that confuse definitions from computational formulas, approximations, and interpretations. If there *is* a generally agreed up definition for the coefficient, please list it. If there is disagreement or confusion or multiple definitions which depend on a given context, please elucidate this. That would be very helpful.

Copyright violation

Parts of this article (see http://www.visualstatistics.net) violate copyright of Cruise Scientific and were removed. For further information contact info@visualstatistics.net.

none of the article now violates any copyright. Rjensen 05:27, 29 March 2007 (UTC)[reply]

X is not a random variable

X is NOT viewed as a random variable in the linear regression, though correlation between X and Y exists. The latter is not the exactly defined correlation from Probability. —Preceding unsigned comment added by 89.96.249.182 (talk) 15:01, 1 May 2009 (UTC)[reply]

Wholesale copyright violation

Almost the entire article was word-for-word out of one of the external references, [1]. On 11 November 2010, not realizing that it was plagiarized, I rewrote some poorly worded parts of it. Today I realized the plagiarism, and I have deleted both the intro and the first titled section, and have written a new intro.

The copying from the source occurred on 9 July 2005 by an anon who hasn't contributed since 2005. On 12 November 2006 the copyright violation was purged, and on 28 January 2007 the entire page was redirected to linear regression. But on 29 March 2007 everything was restored by someone who presumably didn't realize that it was verbatim.

It seems redundant to have an article "multiple correlation" when there are more complete articles coefficient of determination and linear regression, so maybe this page should be redirected to one of them. However, the key equation in this article is quite insightful and does not appear in those articles, so if this page is redirected then this equation and its discussion should be inserted there.

Thoughts, anyone? Duoduoduo (talk) 17:48, 21 November 2010 (UTC)[reply]

I delved into this some more. The copying was done from an online book by David J. Krus. The anon who copied it apparently now signs in as User:David_Cruise, and has received a lot of warnings on his talk page (up until October 2008) and has been rebuked for blanking parts of discussion pages that criticize his contributions -- see e.g. this edit. Apparently he hasn't edited since 13 August 2006. Duoduoduo (talk) 20:59, 21 November 2010 (UTC)[reply]

Formula is wrong?

There are some inconsistencies in the definition here, and I am guessing that the true value is supposed to be a scalar, not a matrix. Are we missing another 'c' on the right of the right-hand term? Shabbychef (talk) 18:55, 30 May 2012 (UTC)[reply]

Vandalism now fixed. Melcombe (talk) 07:53, 31 May 2012 (UTC)[reply]