Sounds like a homework problem. Consult any basic statistics text. Hint: You don't use a t-test to test for a difference in percentages. Check "chi-squared" and/or "contingency table."
Cheers, Bert Gunter -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bunny, lautloscrew.com Sent: Wednesday, September 17, 2008 9:41 AM To: r-help@r-project.org Subject: [R] t-test between percentages Hi all, though i know this is a simple question, i really hope someone could. I am just trying to compare percents respectively the difference in percents by a simple test. t.test usually compares means and is working like it is supposed to be. Now i wonder how i can use a test in R to test for significant difference between two percentages. http://survey.scantron.com/resources/significant-calc.htm is pretty much all i need. How can i solve this in R ? thx in advance m. ______________________________________________ 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. ______________________________________________ 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.
