Agresti-Coull CI for a binomial proportion based on adding z^2/2 successes and z^2/2 failures before computing the Wald CI

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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

1
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.

Examples

1
addz2ci(x = 15, n = 112, conf.level = 0.95)