Date:         Wed, 2 Nov 2005 17:55:53 +0000
Reply-To:     toby dunn <tobydunn@HOTMAIL.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         toby dunn <tobydunn@HOTMAIL.COM>
Subject:      Re: Test - Control Design question - Direct marketing /
              Measurement
Comments: To: davidlcassell@MSN.COM
In-Reply-To:  <BAY103-F12B1FB1B4B9DBE50B435C9B06E0@phx.gbl>
Content-Type: text/plain; format=flowed

O now David,  I know or a fact that the Credit industry has bigger problems
than simply using random samples.  I just wish they would get them solved
and get on to the random sample thingy.



Toby Dunn





From: David L Cassell <davidlcassell@MSN.COM>
Reply-To: David L Cassell <davidlcassell@MSN.COM>
To: SAS-L@LISTSERV.UGA.EDU
Subject: Re: Test - Control Design question - Direct marketing /
  Measurement
Date: Wed, 2 Nov 2005 09:49:20 -0800

jonas.bilenas@CHASE.COM sagely replied:
>Hard to believe that TEST vs CONTROL designs are still being used as the
>standard testing methodology in the consumer credit industry.  With the
>power of SAS, why hurt yourself by looking at a 2 dimensional view of the
>world.
>
>An excellent quote from J. Stuart Hunter on one factor tests:
>“The statistical design of experiments had its origins in the work of Sir
>Ronald Fisher… Fisher showed that, by combining the settings of several
>factors simultaneously in special arrays (experimental designs), it was
>possible to glean information on the separate effects of the several
>factors. Experiments in which one factor at a time was varied were shown to
>be wasteful and misleading.”
>
>Source: J. Stuart Hunter (1987). Applying Statistics to Solving Chemical
>Problems. Chemtech, 17, 167.
>
>For an introduction to Experimental Design (Multi Factor Design), check:
>www.nesug.org/html/Proceedings/nesug05/an/an1.pdf

What *I* find amazing is that the consumer credit industry has all this
information on
marketability and they still think that simple random samples are a good
thing to do.

David
--
David L. Cassell
mathematical statistician
Design Pathways
3115 NW Norwood Pl.
Corvallis OR 97330

_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today - it's FREE!
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/