Re: st: Fw: PROPORTIONAL T TEST WITH OVERLAPPING

[Steven Samuels <ssamuels@albany.edu>]

McNemar's test is the standard test of this hypothesis. Do a search  
on "mcnemar" to find Stata's implementations & other information.  
There is an "exact" version.

Steven

On Apr 13, 2007, at 5:55 PM, keesman wrote:


> Hi,
>
> I want to do a proportional t test with overlapping data  (see  
> below). Official Stata doesn't have this option for their  
> proportion test. The statistical package Quantum has a proportional  
> t test with an overlapping option. The overlapping option adjusts  
> the results to allow for overlapping.
>
> For example:
>
> Each person is asked if they use BrandA  and then a second question  
> do they use BrandB
>
> 1 yes  and 0 no
>
> Id BrandA     BrandB
> 1       1             0
> 2       1             1
> 3       1             0
> 4       0             0
> 5       1             1
> 6        0            1
> 7        0            1
> 8        1            1
> 9        1            0
> 10      1            1
>
> I wish to determine if the proportion of BrandA is significantly  
> different from BrandB  (taking into account overlapping).
>
> I'm eager to know if there is any  Stata program that does this or  
> if there is a reference to  this procedure.
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/