poisson.ci {biostat3}

Exact Poisson confidence intervals.

Description

A wrapper for the poisson.test that allows for vector values.

Usage

poisson.ci(x, T = 1, conf.level = 0.95)

Arguments

x

number of events.

T

time base for event count.

conf.level

confidence level for the returned confidence interval.

Details

This uses stats::poisson.test for the calculations.

Value

A matrix (or vector) with columns giving lower and upper confidence limits for each parameter. These will be labelled as (1-level)/2 and 1 - (1-level)/2 in % (by default 2.5% and 97.5%).

See Also

poisson.test

Examples

### These are paraphrased from data sets in the ISwR package

## SMR, Welsh Nickel workers
poisson.ci(137, 24.19893)

## eba1977, compare Fredericia to other three cities for ages 55-59
poisson.ci(c(11, 6+8+7), c(800, 1083+1050+878))