I think you might do well to consult a local statistical expert, as you appear to be out of your statistical depth here.
Also, is this homework? If so, this is not a homework site (although posters sometimes get help anyway). Cheers, Bert Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." Clifford Stoll On Thu, Feb 19, 2015 at 8:36 AM, varin sacha <varinsa...@yahoo.fr> wrote: > Dear R-helpers, > > I want to compute the density plot (probability plot) of the Chi-square > distribution. > My 2 categorical variables are gender (male, female) and colors of the eyes > (blue, green and brown). > > The sample size n = 100. The proportions are the following : > > male and blue eyes : 10% > male and green eyes : 20% > male and brown eyes : 22% > female and blue eyes : 20% > female and green eyes : 13% > female and brown eyes : 15% > > There are k-1 df = 6-1= 5 > > I don't know how to take into consideration the percents here above in my R > code here below ? > > x <- rchisq(100, 5) > hist(x, prob=TRUE) > curve( dchisq(x, df=5), col='red', add=TRUE) > > > Second point, I want to do the same, to compute the density plot, but this > time for the Fisher distribution. > My categorical variable is gender again (male, female) > My numerical variable is the mark in Mathematics test (3; 4; 5; 5.5) > The proportions are the following : > male and 3 : 10% > male and 4 : 15% > male and 5 : 10% > male and 5.5 : 15% > female and 3 : 12% > female and 4: 0% > female and 5 : 25% > female and 5.5 : 13% > > There are df1=2-1= 1 and df2=8-2= 6 > > Again, I don't know how to take into consideration the percents here above in > my R code here below ? > > > df(100, 1, 6, log = FALSE) > x <- rf(100, 1, 6) > hist(x, prob=TRUE) > curve( df(x,1,6), col='red', add=TRUE) > > Best, > Thanks for your help. > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
