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st: R: Minimal Detectable Difference


From   <[email protected]>
To   <[email protected]>
Subject   st: R: Minimal Detectable Difference
Date   Tue, 5 Jun 2012 14:06:45 +0200


Lars can probably simulate some scenarios with -sampsi-. I find this
approach particularly useful when the limited number of participants
available is due to budget constraints (as it is often the case, sadly).
Kindest Regards,
Carlo


-----Messaggio originale-----
Da: [email protected]
[mailto:[email protected]] Per conto di Lars Folkestad
Inviato: martedì 5 giugno 2012 13:39
A: [email protected]
Oggetto: st: Minimal Detectable Difference

Dear List

This might be a bit more of a stats question than a stata question.

I am about to do a cross sectional study comparing two groups regarding a
measured continous variable.
I know the the variance of the measurement. No one has ever investigated
these groups before using this or similar machines. For practical reasons i
only have a limited number of participants available for this project. I am
now wondering what the minimal detectable difference between the two groups
are with the number of participants i have available.

I will use a t-test (paired, seeing the two groups are matched)

How do i calculate this using stata?

lars

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