A program for the computation of power and determination of sample size in hierarchical experimental designs.
We have devised a program that allows computation of the power of F-test, and hence determination of appropriate sample and subsample sizes, in the context of the one-way hierarchical analysis of variance with fixed effects. The power at a fixed alternative is an increasing function of the sample size and of the subsample size. The program makes it easy to obtain the power of F-test for a range of values of sample and subsample sizes, and therefore the appropriate sizes based on a desired power. The program can be used for the 'ordinary' case of the one-way analysis of variance, as well as for hierarchical analysis of variance with two stages of sampling. Examples are given of the practical use of the program.
Jeanprêtre
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Institute of Anatomy, University of Lausanne, Switzerland.
Kraftsik
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R
D000704:Analysis of Variance; D008432:Mathematical Computing; D009716:Numerical Analysis, Computer-Assisted; D012107:Research Design; D012494:Sampling Studies; D012984:Software; D012985:Software Design