Computes the lower limit and upper limit of the 95 percent confidence interval of percentage estimates
Usage
CI(x, ...)
Arguments
x
a two-dimensional table, matrix or data.frame with 2 columns, giving the counts of successes and failures, respectively
…
other arguments to pass to prop.test, eg conf.level
Value
A 3 column matrix.
Column 1: percentage estimate
Column 2: lower limit of the confidence interval
column 3: upper limit of the confidence interval
Details
Simple wrapper of prop.test. The default confidence interval is 95 percent, but can be modified passing values to prop.test by the conf.level argument.
# NOT RUN {x<-c(2,10,7,8,7) # eg: number of positive casesy<-c(56,22,7,20,5)# eg: number of negative casesCI(cbind(x,y))
CI(cbind(x,y), conf.level=0.99)
# }