On Sun, 2010-02-14 at 12:42 +0500, Faiz Rasool wrote: > I am trying to perform goodness of fit test using R. I am using this website > http://wiener.math.csi.cuny.edu/Statistics/R/simpleR/stat013.html for help. > However, I am unable to carry out the test successfully. My code follows. It > is taken from the website just mentioned. > freq=c(22,21,22,27,22,36) # frequencies obtained after rolling the dice 150 > times. > prob=c(1,1,1,1,1,1)/6 # specify expected frequency for each category. > chisq.test(freq,p=prob) # I do not know what this line means. I just followed > instructions on the website. > The erorr I receive is "erorr in chisq.test(freq,p=prob)/6 probabilities must > sum to 1" > > I am very new to R, so any help would be appreciated. > Faiz.
Faiz, Well ... In my computer( Phenom X4 9650, runing Ubuntu 9.10 and R 2.10.1) the script work > freq=c(22,21,22,27,22,36) # frequencies obtained after rolling the dice 150 times. > prob=c(1,1,1,1,1,1)/6 # specify expected frequency for each category. > chisq.test(freq,p=prob) # I do not know what this line means Chi-squared test for given probabilities data: freq X-squared = 6.72, df = 5, p-value = 0.2423 About the third line You must read ?chisq.test for better know the command, but you execute one chi-square test with uniform probability distribution -- Bernardo Rangel Tura, M.D,MPH,Ph.D National Institute of Cardiology Brazil ______________________________________________ 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.