size.ci.oddsratio {statpsych} | R Documentation |
Sample size for an odds ratio confidence interval
Description
Computes the sample size required to estimate an odds ratio with desired confidence interval precision.
Usage
size.ci.oddsratio(alpha, p1, p2, or, r)
Arguments
alpha |
alpha level for 1 - alpha confidence |
p1 |
planning value for row 1 marginal proportion |
p2 |
planning value for column 1 marginal proportion |
or |
planning value of odds ratio |
r |
desired upper to lower confidence interval endpoint ratio |
Value
Returns the required sample size
Examples
size.ci.oddsratio(.05, .3, .2, 5.5, 3.0)
# Should return:
# Sample size
# 356
[Package statpsych version 1.7.0 Index]