Date:         Thu, 29 Dec 2011 01:04:02 -0800
Reply-To:     drfg2008 <kontakt@datest.de>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         drfg2008 <kontakt@datest.de>
Subject:      Distribution Fit (Gamma)
Content-Type: text/plain; charset=us-ascii

SPSS 20 Vista

when trying to fit a distribution with discrete positive values from 0,1,2,
... with Distribution Fit (extention R)* on the Gamma distribution, this
results in an error message:

"/The distribution could not be fit.  Variable: TotalScore, Distribution:
gamma/"

When eliminating the value 0 there is no error message. This is a bit
strange, since gamma should be defined for values including 0 and the SPSS
dialog (PPLOT) also accepts values including 0.

Frank

*
STATS DISTFIT VARIABLE=TotalScore
DISTRIBUTION=gamma
/OPTIONS QQPLOT=YES.

-----
Dr. Frank Gaeth
FU-Berlin

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