Conditional and unconditional estimators of population size

Autor:	Fred L. Ramsey, Virginia Lesser
Rok vydání:	1995
Předmět:	Statistics and Probability education.field_of_study Population size Population Estimator Total population Efficient estimator Consistent estimator Statistics Econometrics Statistics Probability and Uncertainty Minimax estimator education Animal species General Environmental Science Mathematics
Zdroj:	Environmental and Ecological Statistics. 2:181-190
ISSN:	1573-3009 1352-8505
DOI:	10.1007/bf00456663
Popis:	Estimators for the population sizes of animal species are similar to Horvitz-Thompson estimators — they involve dividing counts of detected animals by the probabilities of detection. Knowing detection probabilities for different subpopulations allows one to estimate each sub-population size with such an estimator, and to add the results for an estimator of the total population. In the case where the proportions of animals belonging to the different sub-populations are also known, this paper shows that using those proportions to arrive at a common average detection probability will, when used in conjunction with the total number of animals detected, result in a better estimator. We provide two examples where the inferior estimator may seem sensible.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::efc9c3991f7db8994c047f5177002696 https://doi.org/10.1007/bf00456663 Zobrazit plný text záznamu Full text from SpringerLink