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


From   "Steichen, Thomas J." <SteichT@rjrt.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: _tabi, exact_ gives obviously wrong P-value
Date   Wed, 22 Dec 2004 12:58:52 -0500

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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