recapr (version 0.4.3)

vChapman: Estimated Variance of the Chapman Estimator

Description

Calculates the estimated variance of the Chapman estimator in a mark-recapture experiment, with given values of sample sizes and number of recaptures.

Usage

vChapman(n1, n2, m2)

Arguments

n1

Number of individuals captured and marked in the first sample. This may be a single number or vector of values.

n2

Number of individuals captured in the second sample. This may be a single number or vector of values.

m2

Number of marked individuals recaptured in the second sample. This may be a single number or vector of values.

Value

The estimate variance of the Chapman estimator, calculated as (n1+1)*(n2+1)*(n1-m2)*(n2-m2)/((m2+2)*(m2+1)^2)

See Also

NChapman, seChapman, rChapman, pChapman, powChapman, ciChapman

Examples

# NOT RUN {
vChapman(n1=100, n2=100, m2=20)
# }