--- keesman <[email protected]> wrote:
> 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.
What about -prtest BrandA == BrandB-?
Hope this helps,
Maarten
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
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