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*To*: dinosaur@usc.edu*Subject*: Re: Dino cladistics - long with requotations*From*: Stanley Friesen <sarima@ix.netcom.com>*Date*: Tue, 11 Mar 1997 20:24:15 -0800*Reply-to*: sarima@ix.netcom.com*Sender*: owner-dinosaur@usc.edu

At 04:19 PM 3/11/97 -0500, Dinogeorge@aol.com wrote: >It's entirely possible I've been misled into equating "confidence >level" with "consistency index." However, although the two terms >surely have different formal definitions, they do seem to be used >much the same way in the literature. If so, it is based on a misunderstanding. The two are quite different. The consistency index is a measure of how well the data support the reported cladogram. The confidence level is *should* be a measure of the probability that the two cladogram do not effectively differ from one another. At least that is what the standard statistical definition would mean when applied to cladograms. As far as I can tell, there is, as yet, no way to truly determine this value. Alternatiely, one could talk about the confidence level for a clade, which would be the probability that a particular way of breaking a polytomy is correct (or, equivalently, the probability that a candidate clade is real). -------------- May the peace of God be with you sarima@ix.netcom.com swf@elsegundoca.ncr.com

**Follow-Ups**:**Evolutionary taxonomy***From:*Rob Meyerson <Robert.J.Meyerson@uwrf.edu>

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