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st: Fw: PROPORTIONAL T TEST WITH OVERLAPPING


From   "keesman" <[email protected]>
To   <[email protected]>
Subject   st: Fw: PROPORTIONAL T TEST WITH OVERLAPPING
Date   Sat, 14 Apr 2007 07:55:23 +1000

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.



With best wishes, Karl Keesman

Survey Design & Analysis P/L
ABN 37 051 831 826
Karl Keesman,
Managing Director,
PO Box 1206,
Blackburn North VIC 3130
Phone: 03 9878 7373.
Fax: 03 9878 2345.
Web site: http://survey-design.com.au


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