## Exact (Owen’s Q) [Power / Sample Size]

Hi Imph,

Welcome.

» From where I am, I was unable to access dileti's publications. Can you please help me get them.

1. The paper contains tables for certain CVs, T/R-ratios, and target power.
If you want something else, don’t be tempted to interpolate. Power curves are highly nonlinear and hence, interpolation is not that easy.
2. Although the exact formula is given, calculating the definite integrals of the bivariate noncentral t-distribution is not trivial.
Why do you want to re-invent the wheel? PowerTOST is  Open Source (licensed under GPL-3), comes at no cost, was used in numerous publications, textbooks, and even by the …

Dif-tor heh smusma 🖖
Helmut Schütz

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