# Sample size requirements to test the equality of raters' precision

*M. M. Shoukri* and
*O. Demirkaya*

*Journal of Applied Statistics*, 2000, vol. 27, issue 4, 483-494

**Abstract:**
Exact and approximate methods are developed to calculate the required number of subjects n in a repeatability study, where repeatability is measured by the precision of measurements made by a rater. The exact method is based on power calculations under the non-null distribution of the multiple coefficient of determination, which requires intensive numerical computation. The approximate method is based on predictions from families of non-linear curves fitted by the method of least squares.

**Date:** 2000

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**DOI:** 10.1080/02664760050003669

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