The following query raises the question: What is it that students learn from point and click dialogs?"
Date: Fri, 03 Oct 2003 16:57:42 -0400 From: To: [EMAIL PROTECTED] Subject: Splus question Message-ID: <[EMAIL PROTECTED]> I don't know if this is the right list to post this question. If not, please let me know where I should post this. I have a dataframe with 3 variables: ID, Y, Group Group is either 1, 2, 3. I am trying to run a t-test to compare the three groups on outcome Y. I know how to do this using the point and click dialogs. But can't get it to work on the command line. When I type: t.test(y, group) it just compares y and group as though they represent the two samples. I tried doing something with tapply(y, group) but don't know how that works. If someone knows, please email me. Thanks. ********************************************************** Cliff Lunneborg, Professor Emeritus, Statistics & Psychology, University of Washington, Seattle [EMAIL PROTECTED] ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
