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*Subject*: **Re: [office-formula] CHITEST definition**

*From*:**Eike Rathke <erack@sun.com>***To*: office-formula@lists.oasis-open.org*Date*: Mon, 12 Mar 2007 19:10:46 +0100

Hi Andreas, On Friday, 2007-03-09 14:36:03 -0700, Andreas J. Guelzow wrote: > > > Furthermore, Ecma/Excel's definition of degrees of freedom looks weird, > > > for rows>1 and cols>1 they say it would be (rows-1)*(cols-1). Why?!? > > > > Btw, OOo does the same. Probably because it was documented as such. > > Which test is CHITEST supposed to perform? > > In the cases of a test for independence or a test of homogeneity, these > degrees of freedom make sense. (But we should have only one regular > region). It claims to be an independence test. On the other hand ... > In the case of a Goodness-of-Fit test one would have observed and > expected frequencies (corresponding to each other) and the degree of > freedom should be n-1. ... it gets two arrays passed, one of actual/observed values and one of expected values. See also the current definition in the latest draft document uploaded on Friday. If each column of observed values would represent a different group, matching those of the expected values, what would n-1 be then? For example: observed: x,y expected: X,Y =CHITEST(A1:B4;D1:E4) | A B C D E -+-------------- 1| x y X Y 2| x y X Y 3| x y X Y 4| x y X Y How would the (rows-1)*(cols-1) fit in there? Eike -- Automatic string conversions considered dangerous. They are the GOTO statements of spreadsheets. --Robert Weir on the OpenDocument formula subcommittee's list.

**Follow-Ups**:**Re: [office-formula] CHITEST definition***From:*"Andreas J. Guelzow" <aguelzow@math.concordia.ab.ca>

**References**:**CHITEST definition***From:*Eike Rathke <erack@sun.com>

**Re: [office-formula] CHITEST definition***From:*Eike Rathke <erack@sun.com>

**Re: [office-formula] CHITEST definition***From:*Eike Rathke <erack@sun.com>

**Re: [office-formula] CHITEST definition***From:*"Andreas J. Guelzow" <aguelzow@math.concordia.ab.ca>

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