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Re: st: _tabi, exact_ gives obviously wrong P-value


From   Marcello Pagano <[email protected]>
To   [email protected]
Subject   Re: st: _tabi, exact_ gives obviously wrong P-value
Date   Wed, 22 Dec 2004 13:39:05 -0500

Another example of "old is good" -- I see more and more
of these as I get older!!

The tabi I have on this machine:

. which tabi
C:\Stata8\ado\base\t\tabi.ado
*! version 2.0.4  26apr1999

m.p.

Steichen, Thomas J. wrote:

Marcello Pagano wrote:



. tabi 27879 35177 29377 17201 \ 118 187 183 65, e chi2

| col
row | 1 2 3 4 | Total
-----------+--------------------------------------------+----------
1 | 27,879 35,177 29,377 17,201 | 109,634
2 | 118 187 183 65 | 553
-----------+--------------------------------------------+----------
Total | 27,997 35,364 29,560 17,266 | 110,187

Pearson chi2(3) = 17.7073 Pr = 0.001
Fisher's exact = 0.001

Hmmmm It worked for me?

What version of tabi and Stata are you running, Marcello?

I get:

.. tabi 27879 35177 29377 17201 \ 118 187 183 65, e chi2

| col
row | 1 2 3 4 | Total
-----------+--------------------------------------------+----------
1 | 27,879 35,177 29,377 17,201 | 109,634 2 | 118 187 183 65 | 553 -----------+--------------------------------------------+----------
Total | 27,997 35,364 29,560 17,266 | 110,187
Pearson chi2(3) = 17.7073 Pr = 0.001
Fisher's exact = 1.000

.. which tabi
C:\Stata8\ado\updates\t\tabi.ado
*! version 2.0.5 13jul2004

Stata executable
folder: C:\Stata8\
name of file: wsestata.exe
currently installed: 06 Oct 2004
Ado-file updates
folder: C:\Stata8\ado\updates\
names of files: (various)
currently installed: 24 Nov 2004

Tom

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