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Last data update: 2014.03.03

R: Calculates a Wald confidence interval with continuity...

wald.cc

R Documentation

Calculates a Wald confidence interval with continuity correction

Description

wald.cc gives a two-sided Wald confidence interval with continuity correction for the difference of two dependent proportions. The continuity correction factor is frac{1}{n}. Data are assumed to be of a fourfold table, which contains the numbers of concordance and the numbers of discordance of two dependent methods.

Usage

wald.cc(b, c, n, alpha)

Arguments

`b`	first number of discordant pairs in a fourfold table as described above
`c`	second number of discordant pairs in a fourfold table as described above
`n`	number of observed objects
`alpha`	type I error; between zero and one

Value

A list with class '"htest"' containing the following components:

`conf.int`	a confidence interval for the difference in proportions
`estimate`	estimated difference in proportions

Author(s)

Daniela Wenzel, Antonia Zapf

References

Fleiss, Joseph L. et al. (2003). Statistical Methods for Rates and Proportions. Wiley.

Examples

# b=10, c=20, n=50, type I error is 0.05
conf.int=wald.cc(10,20,50,0.05)