Date:         Sat, 5 Apr 1997 16:39:09 EST
Reply-To:     Jerry Dallal <jerry@MINT.HNRC.TUFTS.EDU>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@UGA.CC.UGA.EDU>
From:         Jerry Dallal <jerry@MINT.HNRC.TUFTS.EDU>
Organization: Tufts University
Subject:      Re: How SPSS uses harmonic means

Nichols@spss.com (David Nichols) writes:
 
> With unequal N, the Tukey-Kramer method is known to be valid (as you
> point out), but is not guaranteed to give results that are representable
> as homogeneous subsets (see, e.g., Hsu's Multiple Comparisons: Theory
> and Methods). That's why we don't do that for homogeneous subsets
> results.
 
I'll have to check Hsu.  It appears that "homogenoeus subsets" has a
technical definition that I'm not familiar with.  I had been reading
"homogeneous subset" to mean "not significantly different from each
other" as in "Treatments sharing the same superscript are not
significantly different from each other" in which case any MCP could
generate homogeneous subsets.
 
Thanks.