power.multi: Statistical power for F tests of variance proportions

In rpsychi: Statistics for psychiatric research

Description

This is an internal function. power.multi computes statistical power for F tests of variance proportions.

Usage

power.multi(n, n.ind, delta, sig.level = 0.05)

Arguments

n	sample size
n.ind	number of independent variables
delta	Cohen's f^2
sig.level	a numeric contains the significance level (default 0.05)

Value

Return a numeric containing the statistical power.

Author(s)

Yasuyuki Okumura
Department of Social Psychiatry,
National Institute of Mental Health,
National Center of Neurology and Psychiatry
[e-mail]

References

Cohen J (1988). Statistical power analysis for the behavioral sciences (2nd ed). Hillsdale, NJ: Erlbaum.

Examples

##Cohen (1988) ex 9.1
power.multi(n=95, n.ind=5, delta=.1111, sig.level=.05)

rpsychi documentation built on May 1, 2019, 10:10 p.m.