wilson.ci | R Documentation |
Alternatives to prop.test
and binom.test
.
wilson.ci(x, n = 100, conf.level = 0.95)
x |
number of 'successes' |
n |
number of trials |
conf.level |
confidence level |
wald.ci
produces Wald confidence intervals. wilson.ci
produces Wilson confidence intervals (also called “plus-4” confidence
intervals) which are Wald intervals computed from data formed by adding 2
successes and 2 failures. The Wilson confidence intervals have better
coverage rates for small samples.
Lower and upper bounds of a two-sided confidence interval.
Randall Pruim
A. Agresti and B. A. Coull, Approximate is better then ‘exact’ for interval estimation of binomial proportions, American Statistician 52 (1998), 119–126.
prop.test(12,30)
prop.test(12,30, correct=FALSE)
wald.ci(12,30)
wilson.ci(12,30)
wald.ci(12+2,30+4)
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