Computes the sample size required to test an intraclass correlation (icc)
with desired power in a one-way random effects ANOVA model.
Usage
size.test.icc(alpha, pow, icc, r, h)
Arguments
- alpha
alpha level for hypothesis test
- pow
desired power
- icc
icc planning value
- r
number of measurements (items, raters, forms)
- h
null hypothesis value of icc
Value
Returns the required sample size
References
Donner A, M. E (1987).
“Sample size requirements for reliability studies.”
Statistics in Medicine, 6, 441–448.
doi:10.1002/sim.4780060404
.
Examples
size.test.icc(.05, .90, .65, 4, .50)
#> Sample size
#> 104
# Should return:
# Sample size
# 104