estN {CARE1} | R Documentation |
Population size estimation based on sample coverage approach for closed capture-recapture models.
estN(z, method="Indep", se=FALSE, nboot=200)
z |
the vector of capture histories or ascertainment records. |
method |
the method employed to estimate population size.
method="Indep": population size estimate for independent samples; |
se |
should calculus bootstrap standard error? |
nboot |
the number of bootstrap resampling times. |
population size estimator
se
estimated standard error of the population size estimation based on bootstrap replications, which might vary with trials.
cil
confidence interval lower limit (using a log-transformation).
ciu
95% confidence interval upper limit (using a log-transformation).
Nhat-0(Indep)
population size estimate for independent samples; see Equation (9) of Chao et al. (2001).
Nhat
Population size estimate for sufficiently high sample coverage cases; see Equation (12) of Chao et al. (2001).
Nhat-1
One-step population size estimate for low sample coverage cases; see Equation (13) of Chao et al. (2001).
This estimator is suggested for use when the estimated s.e. of Nhat is relatively large.
Chao, A., and Tsay, P. K. (1998). A sample coverage approach to multiple-system estimation with application to census undercount. Journal of the American Statistical Association, 93: 283-293.
Chao, A., Tsay, P. K., Lin, S. H., Shau, W. Y., and Chao, D. Y. (2001). The applications of capture-recapture models to epidemiological data. Statistics in Medicine, 20: 3123-3157.
data(HAV) estN(HAV,method="LSC",se=TRUE,nboot=200)