On 04-Oct-03 Cliff Lunneborg wrote: > The following query raises the question: What is it that students learn > from point and click dialogs?"
Two things, I think. 1. How not to think. 2. How to be unaware of possible error. Maybe others. Ted. > > 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 -------------------------------------------------------------------- E-Mail: (Ted Harding) <[EMAIL PROTECTED]> Fax-to-email: +44 (0)870 167 1972 Date: 04-Oct-03 Time: 20:20:29 ------------------------------ XFMail ------------------------------ ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
