addz2ci: Agresti-Coull CI for a binomial proportion based on adding z^2/2
successes and z^2/2 failures before computing the Wald CI
Description
Agresti-Coull CI for a binomial proportion based on adding z^2/2
successes and z^2/2 failures before computing the Wald CI. The CI is
truncated, when it overshoots the boundary.
Usage
addz2ci(x, n, conf.level)
Arguments
x
number of successes
n
number of trials
conf.level
confidence coefficient
Value
A list with class '"htest"' containing the following components:
conf.int
The confidence intervall for the proportion
estimate
The estimator for the proportion
References
Agresti, A., Coull, B. (1998): Approximate is better than exact for
interval estimation of binomial proportions. The American
Statistician 52, 119--126.