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re: st: Checking reliability of a measurement device


From   David Airey <david.airey@vanderbilt.edu>
To   statalist@hsphsun2.harvard.edu
Subject   re: st: Checking reliability of a measurement device
Date   Fri, 26 Nov 2004 10:17:04 -0600

Hi Statalisters,

a Dentistry PhD student did some measurements on 12
teeth with varying conditions and he asked me how
could he show that the device used for the
measurements is reliable. More specifically each one
of the 12 teeth has been measured by this device by 2
raters (a and b) X 2 time points (week 1 and week 2) X
6 relative positions =   24 measurements. The goal is
to show that the discrepancies among measurements are
not statistically significant.
You might look at Stata's "kappa" and "alpha" commands...

-Dave

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