Hello I have used recently the kolmogorov smirnov test, which is a test of normality. This test is named ks.test() in ctest library of R. I wonder if the results of ks.test () are true, because the results are strange, time to time. thank you for help meriema -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Meriema BELAIDOUNI <meriema at info.univ-angers.fr> writes:> Hello > I have used recently the kolmogorov smirnov test, > which is a test of normality. > This test is named ks.test() in ctest library of R. > I wonder if the results of ks.test () are true, because > the results are strange, time to time. > thank you for help > meriemaYou'll need to supply us with harder evidence than that! (K-S is known to be badly biased in the conservative direction if parameters are estimated from the data, but you are not even telling us enough to rule out blatant user errors. Shapiro.test() is a much better test of normality.) -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
On Mon, 28 May 2001 15:26:54 +0200, you wrote in message <3B12521D.34FF9C7F at info.univ-angers.fr>:>Hello >I have used recently the kolmogorov smirnov test, >which is a test of normality. >This test is named ks.test() in ctest library of R. >I wonder if the results of ks.test () are true, because >the results are strange, time to time.When you see strange results, you should check the bug list (under the link "bug tracking" at www.r-project.org). If your results aren't discussed there, then put together an example showing what's strange, and post it to r-help, or, if you're sure it's a bug, to the bug tracking system. When you just say they're strange, nobody will be able to help. Duncan Murdoch -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
>Hello >I have used recently the kolmogorov smirnov test, >which is a test of normality. >This test is named ks.test() in ctest library of R. >I wonder if the results of ks.test () are true, because >the results are strange, time to time. >thank you for help >meriemaIn ctest, you have the Shapiro-Wilk test of normality (shapiro.test) which is to be preferred to K-S, especially for intrinsic hypothesis, i.e.: when mean and standard deviation are estimated from the sample itself. Philippe Grosjean -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-. -.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._. _._ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._