Re: [R] number of effective tests

2008-07-10 Thread Charles C. Berry
On Thu, 10 Jul 2008, Georg Ehret wrote: Dear R community, I am using 6 variables to test for an effect (by linear regression). These 6 variables are strongly correlated among each other and I would like to find out the number of independent test that I perform in this calcuation. For wha

Re: [R] number of effective tests

2008-07-10 Thread Daniel Malter
Hi, what do you mean by effective number of tests? How you approach it also depends on the research tradition in your field. Some fields just include the variables in alternative regressions and then include them jointly. However, since your variables are so highly correlated (i.e. they convey alm

Re: [R] number of effective tests

2008-07-10 Thread Moshe Olshansky
> From: Georg Ehret <[EMAIL PROTECTED]> > Subject: [R] number of effective tests > To: "r-help" <[EMAIL PROTECTED]> > Received: Friday, 11 July, 2008, 11:46 AM > Dear R community, >I am using 6 variables to test for an effect (by > linear regress

[R] number of effective tests

2008-07-10 Thread Georg Ehret
Dear R community, I am using 6 variables to test for an effect (by linear regression). These 6 variables are strongly correlated among each other and I would like to find out the number of independent test that I perform in this calcuation. For this I calculated a matrix of correlation coeff