What David was getting at is that you interpreted the P-value as one minus the P-value, not a safe practice. There is also some question about whether it would have been better to recommend a good book or course. Frank
Raphael Saldanha wrote: > > Hi David, > > This is not private tutoring, just someone trying to help, and I'm sorry > for my distraction. > > On Tue, Nov 1, 2011 at 10:34 PM, David Winsemius <dwinsemius@>wrote: > >> Shahab; >> >> You would be well advised not to seek private tutoring from someone on >> the >> Internet who tells you that a p-value of 0.008736 is "not significant". >> >> >> >> On Nov 1, 2011, at 8:09 PM, Raphael Saldanha <saldanha.plangeo@> >> wrote: >> >> > Hi Shahab, >> > >> > This test shows that there is some positive statistical correlation, >> BUT >> > the p-value of the test - this is, the level of significance - shows >> that >> > the correlation is not statistically significant at 95% confidence >> level. >> > So, the correlation may be equal to zero. >> > >> > To understand this concepts in a good way, you need to be secure about >> > variance and hypothesis test. >> > >> > I can help you more if you need. Send me a direct mail (this list is >> for >> > doubts about R, not conceptual statistics). I will be happy to help you >> > with Statistics. >> > >> > My e-mail: saldanha.plangeo@ >> > >> > On Tue, Nov 1, 2011 at 8:58 PM, shahab <shahab.mokari@> wrote: >> > >> >> Hi, >> >> >> >> I am not really familiar with Correlation foundations, although I read >> >> a lot. So maybe if someone kindly help me to interpret the following >> >> results. >> >> I had the following R commands: >> >> >> >> correlation <-cor( vector_CitationProximity , vector_Impact, method = >> >> "spearman", use="na.or.complete") >> >> cor_test<-cor.test(vector_CitationProximity, vector_Impact, >> >> method="spearman") >> >> >> >> and the results are: >> >> "correlation" >> >> Correlation = 0.04715686 >> >> >> >> "cor_test" >> >> Spearman's rank correlation rho >> >> >> >> data: vector_CitationProximity and vector_Impact >> >> S = 5581032104, p-value = 0.008736 >> >> alternative hypothesis: true rho is not equal to 0 >> >> sample estimates: >> >> rho >> >> 0.04582115 >> >> >> >> >> >> So apparently, there is positive correlation between two given >> >> variables since Correlation = 0.04715686 > 0 >> >> However I couldn't interpret the significance ?' what does "rho" say? >> >> Is there any simple sample that I can read and try to understand? I am >> >> do confused in understanding how significance can be interpreted. >> >> >> >> Thanks, >> >> >> >> /Shahab >> >> >> >> ______________________________________________ >> >> R-help@ 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. >> >> >> > >> > >> > >> > -- >> > Atenciosamente, >> > >> > Raphael Saldanha >> > saldanha.plangeo@ >> > >> > [[alternative HTML version deleted]] >> > >> > ______________________________________________ >> > R-help@ 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. >> > > > > -- > Atenciosamente, > > Raphael Saldanha > saldanha.plangeo@ > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@ 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. > ----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/How-to-interpret-Spearman-Correlation-tp3965809p3972797.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.