carol white <wht_...@yahoo.com> wrote >So the conclusion is that abline(0,1) should always be used and if it doesn't >go through the qqplot, the two distributions are not similar?
I think it depends what you mean by "similar". E.g., if you mean "are both of these distributions (e.g.) normal?" then abline(0,1) is not always useful. But if you mean "Do these have the same mean, sd, and distribution?" then abline(0,1) is the way to go. Peter Peter L. Flom, PhD Statistical Consultant Website: www DOT peterflomconsulting DOT com Writing; http://www.associatedcontent.com/user/582880/peter_flom.html Twitter: @peterflom ______________________________________________ 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.
