Re: [R] How to answer the question about transitive correlation?
> Date: Fri, 22 Apr 2011 11:42:59 +0800 > From: mailzhu...@gmail.com > To: r-help@r-project.org > Subject: [R] How to answer the question about transitive correlation? > > Hi, everyone. I know it may be a basic statistical question. But I can't > find a good answer. > > I have a question raised by one of the reviewers. > Factor A expression was strongly correlated with B expression (chi-square) > in this series. Prior reports by the same authors showed that B expression > strongly correlated with survival (Log-rank). Please provide an explanation > why then were the results not transitive. The only explanation that would have any value would require you post the data and let everyone look at it and any R output would be a benefit too. So you compared A and B with one test, B vs C with another, cutoff the result at some arbitrary criterion, and then wonder why some unspeficied test and criterion applied to A vs C doesn't vote in the majority with the same answer? Changing acceptance levels or applying a "correction" after careful shoppping can always "fix" that logical inconsistency LOL. Its not hard to plot 3 normal curves on same graph and see one example of how their overlaps can relate. I'm not sure what to think but perhaps you could look at stuff like this, http://en.wikipedia.org/wiki/Path_analysis_%28statistics%29 __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] How to answer the question about transitive correlation?
On 22.04.2011 05:42, zhu yao wrote: Hi, everyone. I know it may be a basic statistical question. But I can't find a good answer. I have a question raised by one of the reviewers. Factor A expression was strongly correlated with B expression (chi-square) in this series. Prior reports by the same authors showed that B expression strongly correlated with survival (Log-rank). Please provide an explanation why then were the results not transitive. I do not understand anything here: - First of all: Why is this a question on the *R* help mailing list? - How is "the reviewer"? - How is "the same authors"? - Which article are you referring to? - What is *known* about the relation between the stuff you named "A", "B" and "survival"? Uwe Ligges Thanks a lot. *Yao Zhu* *Department of Urology Fudan University Shanghai Cancer Center Shanghai, China* [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] How to answer the question about transitive correlation?
Hi, everyone. I know it may be a basic statistical question. But I can't find a good answer. I have a question raised by one of the reviewers. Factor A expression was strongly correlated with B expression (chi-square) in this series. Prior reports by the same authors showed that B expression strongly correlated with survival (Log-rank). Please provide an explanation why then were the results not transitive. Thanks a lot. *Yao Zhu* *Department of Urology Fudan University Shanghai Cancer Center Shanghai, China* [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
