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RE: st: chi2 goodness-of-fit test


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: chi2 goodness-of-fit test
Date   Fri, 23 Jul 2010 13:57:48 +0100

Noting that -csgof- (Michael N. Mitchell, UCLA) does not allow -if-, the
list of possibilities under this heading includes

-mgof- (Ben Jann, SJ) 

SJ-8-2  st0142  . Multinomial GOF: Large-sample svy & small-sample exact
tests
        (help mgof if installed)  . . . . . . . . . . . . . . . . . .
B. Jann
        Q2/08   SJ 8(2):147--169
        computes distributional tests for discrete (categorical,
        multinomial) variables and supports large-sample tests for
        complex survey designs and exact tests for small samples

-chitest-, -chitesti- from -tab_chi- (NJC, SSC)

-cagof- in Steve's posting looks like a typo for -csgof-. I'd cavil at
the description in -csgof- that it's a test for comparing percentages.
It's a test for comparing frequencies, not quite the same thing. 

Nick 
n.j.cox@durham.ac.uk 

Steven Samuels

As asked by the FAQ, please give the source of all non-official commands

The following will work.
***************
preserve
keep if variable ==1
cagof ???
restore
***************

But -mgof-  (from SSC) is a better command in many ways, including its  
ability to accept an -if- clause.

On Jul 22, 2010, at 6:53 PM, Frank Gallo wrote:

I want to carry out a chi2 goodness-of-fit test, but I want to add a
qualifier (e.g., if variable == 1). The csgof command does not allow
this option. I greatly appreciate any suggestions on how to accomplish
this task.


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