Bug in CSS: Statistica program?

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Article #146

#146

From: Sharachchandra Lele;100 BldgT-4;...
Date: Thu, 30 Jul 1992 05:40

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While reviewing CSS:Statistica (for DOS) (a summary of which I posted
recently) I found the following "Bug" that I would like to crosscheck
with others who have used this program:

CSS uses the "sample std. dev." formula for calculating standard
deviation. However, when it calculates standard errors (either in the
ANOVA-descriptive stats command, or in GRAPHICS:box/whisker plot), it
appears to use the "population s.d." value! I noticed this when I was
cross-checking the results using SYSTAT.

As far as I know, the convention is to use sample s.d. always.
Have others noticed this bug? Or am I making a mistake? or is there
nothing wrong with this method?

--Sharad Lele
Energy & Resource Group
Univerity of California, Berkeley

Electronic-mail:	lele@violet.berkeley.edu	(Internet)

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Path: arc1-ca.pugleaf.net!sparky!uunet!sun-barr!ames!agate!violet.berkeley.edu!lele
From: lele@violet.berkeley.edu (Sharachchandra Lele;100 BldgT-4;26886;5106440692;NT23)
Newsgroups: sci.math.stat
Subject: Bug in CSS: Statistica program?
Date: 30 Jul 1992 05:40:48 GMT
Organization: University of California, Berkeley
Lines: 20
Sender: Sharad Lele
Message-ID: <157vd0INN374@agate.berkeley.edu>
References: <1992Jul3.163117.9940@jupiter.sun.csd.unb.ca>
NNTP-Posting-Host: violet.berkeley.edu
Summary: Standard error calculation is "wrong"

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