Survey Toolbox

Capture-Recapture analysis

Sample size for survey 1

Sample size for survey 2

Number present in both surveys

Enter desired confidence interval

0.9 0.95 0.98 0.99

Submit

Estimate the total size of population based on capture-recapture analysis of two independent surveys. this approach uses the size of each survey, plus the number of units that are "captured" in both surveys to estimate the total size of the population.