Confidence intervals for counts

Introduction

Confidence intervals for counts can be calculated for continuous variables that are counts. 

Function

Basic command
ci means varlist, poisson
Useful options
ci means varlist, poisson level(#)
Explanations
varlistInsert the name(s) of the variable(s) that you want to use.
level(#)Specify the confidence level. Default is 95. 
More information
help ci

Practical example

Dataset
StataData1.dta
Variable nameunemp_42
Variable labelDays in unemployment (Age 42, Year 2012)
Value labelsN/A
ci means unemp_42, poisson

In this example, the mean is 17.53 days in unemployment. The 95% confidence interval is 17.45-17.61 days.