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331. Note: On the Bias and Estimated Variance of Chapman's Two-Sample Capture-Recapture Population Estimate
Janet T. Wittes
Vol. 28, No. 2 (Jun., 1972), pp. 592-597
Published by: International Biometric Society
Stable URL: http://www.jstor.org/stable/2556173
Page Count: 6
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This note demonstrates that Chapman's estimate NU for population size in a two-sample capture-recapture experiment is unbiased when the sum of the sample sizes is at least as great as the population size. Further, an estimate of the variance of NU is proposed and is shown to be unbiased when n1 + n2 ≥ N.
Biometrics © 1972 International Biometric Society