On 31 May 2000, Vmcw wrote: > >>It is 10. I hope, you are talking about Variance Inflation Factor. > >>More than 10 indicates severe multicollinearity. Thus spake Jin Singh. And someone else (was it Dave Heiser?) retorted, sensibly I thought, > >And where does this magic number come from? :) To which Tom in PA replied (possibly tongue-in-cheek?), > Neter, Wasserman, Nachtsheim, and Kutner, of course! (or is it Wasserman, > Kutner, Neter, and Nachtsheim or one of the other 22 permutations?). I've heard of a Wasserman (or Wassermann?) test, but didn't think it had to do with VIF. Dunno about all those other blokes. But apart from argument by Appeal to Irrelevant Authority at HeadQuarters, was there actually some _reasoning_ underlying the selection of VIF = 10, or was it just someone's arbitrary guess (like the 10 subjects per variable one is supposed to have before one dares essay a factor analysis)? -- Don. ------------------------------------------------------------------------ Donald F. Burrill [EMAIL PROTECTED] 348 Hyde Hall, Plymouth State College, [EMAIL PROTECTED] MSC #29, Plymouth, NH 03264 603-535-2597 184 Nashua Road, Bedford, NH 03110 603-471-7128 =========================================================================== This list is open to everyone. Occasionally, less thoughtful people send inappropriate messages. Please DO NOT COMPLAIN TO THE POSTMASTER about these messages because the postmaster has no way of controlling them, and excessive complaints will result in termination of the list. For information about this list, including information about the problem of inappropriate messages and information about how to unsubscribe, please see the web page at http://jse.stat.ncsu.edu/ ===========================================================================