fpower.hlp.htm

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help for fpower
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Anova power analysis

        fpower , a(levels) [ b(levels) c(levels) r(levels) delta(value)
              rho(value) alpha(value) n(sampsize) graph]


Description

fpower performs power analysis of anova designs of one, two or three factors.
Users are required to include the number of levels of factor a.



fpower Options

b the number of levels of factor b (default = 1).

c the number of levels of factor c (default = 1).

r the number of levels of repeated factor (default = 1).

delta the effect size (default = .25).

alpha the alpha level (default = .05).

rho the intraclass correlation (default = 0).

n specific sample size of interest.

Examples

 . fpower, a(4) delta(1.2) graph
 . fpower, a(4) b(2) delta(0.75) /* power for factor_a when a has 4 levels and factor_b has 2 */
 . fpower, a(2) b(4) delta(0.75) /* power for factor_a when a has 2 levels and factor_b has 4 */

Acknowledgements

 Based on (copied from) on the SAS macro program, FPOWER.SAS (version 1.2),
     Created 1990, revised 1995, by Michael Friendly <FRIENDLY@YorkU.CA>.

Author

     Philip B. Ender
     UCLA Academic Technology Services
     enderatucla.edu