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st: RE: Power calculation for McNemar's test
Unfortunately I do not think the 'sampsi' command is applicable for
matched pairs.
>>> [email protected] 26/01/2006 11:47:32 >>>
A -findit power- pointed me to -sampsi-, won't that do the trick?
HTH,
Maarten
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting adress:
Buitenveldertselaan 3 (Metropolitan), room Z214
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Eamonn
O'Brien
Sent: donderdag 26 januari 2006 12:44
To: [email protected]
Subject: st: Power calculation for McNemar's test
Hi
I am looking for some help with regard to power calculation using
McNemar's test.
I have 2 staining methods 'standard' and 'new' for reading slides. I
have a population consisting of 90 'routine' slides and 20 'abnormal'
slides which will be screened by 35 screeners using both stains. I
wish
to be able to detect a 5% difference in the routine slides and 10%
difference in the 'abnormal'. Does Stata have a routine for this
calculation? As my sample size is fixed I am interested in what are
the
power and significance level scenarios that I can obtain for this
experiment?
*
* 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/
*
* 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/
*
* 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/
