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Date:   Mon, 26 May 2003 06:19:02 -0600
Reply-To:   WCS-Belize <batsncats@starband.net>
Sender:   "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:   WCS-Belize <batsncats@starband.net>
Subject:   SPSS 10.x Win DFA interpretation still need HELP!!!!
Content-Type:   text/plain; charset="iso-8859-1"; format=flowed

Hi all,

Running SPSS 10.x Windows. Running DFA and have a question on the probabilities given in the Case Wise Statistics table. Being way out in the jungle we have limited resources (no discussion with colleagues) so all of you out there are the support network :-)

The SPPS results Coach provides an explanation that is 180 from what was given in a few examples provided on WWW sites using DFA. This is confusing at best.

So can someone like Arthur J. Kendall help with the explanation of interpretation of the various probabilities displayed in SPSS when you run DFA?

The first display is P(D>d| G=g) over p and df, the followed by P(G=g|D=d) and then the second group P(G=g|D=d) is given. What is not clear, at least for a dumb field biologist :-) is which of the probabilities are used to determine which is the predicted group membership. What is important is to determine when unclassified cases are classified incorrectly into a class they do not belong to. This is for cases when they actually do not belong to a predefined or classified case at all.

Thanks again for all the previous replies that were close but did not answer the key question.

Cheers from the Jungles of Belize.


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