Date:         Thu, 5 Jul 2001 12:11:41 -0400
Reply-To:     Peter Flom <peter.flom@NDRI.ORG>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Peter Flom <peter.flom@NDRI.ORG>
Subject:      Oops re Exhaustive crosstabs
Comments: To: Lee_Medoff@READERSDIGEST.COM
Content-Type: text/plain; charset=US-ASCII

Matthew Zack, in private communication, pointed out that I goofed In my earlier post.  The correct number of 18 way interactions is, as I said, 36!/18!*18!, but this is about 9 billion, not 4*10^41.  That's what I get for trying to do a calculation in Excel!

Still, the point I made is correct.  It is far too much to even look at, much less think about.



Peter L. Flom, Ph.D.
Principal Research Associate
National Development and Research Institutes, Inc.
2 World Trade Center
16th floor
New York, NY 10048

(212) 845-4485
(212) 845-4698 (fax)
Peter.Flom@ndri.org