Message-ID: <XFMail.050426160527.Ted.Harding@nessie.mcc.ac.uk>
Date: 2005-04-26T15:05:27Z
From: (Ted Harding)
Subject: Finding 'ncp' for t
Hi Folks,
I'm looking for a neat procedure for the following:
Given t0 such that
pt(t0,df,ncp=0) = alpha (given)
find ncp0 such that for given beta
pt(t0,df,ncp=ncp0) = (1 - beta)
(In other words, what's the ncp such that you get power (1-beta)
to detect it, using a 1-sided test with size alpha when ncp = 0?)
In the past I've done the groping by hand, but this time it
needs to be done many times over, so a good solver for ncp0
in this situation would be handy.
With thanks,
Ted.
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E-Mail: (Ted Harding) <Ted.Harding at nessie.mcc.ac.uk>
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Date: 26-Apr-05 Time: 15:02:24
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