Some sampling methods for rare and clustered populations / Alguns métodos de amostragem para populações raras e agrupadas 

AUTOR(ES)

Luis Henrique Teixeira Alves Affonso

DATA DE PUBLICAÇÃO

2008

RESUMO

In many surveys we find hard observing individuals, like in rare diseases, elusive individuals or sparsely distributed individuals. This work is about sampling schemes for rare populations, more specifically rare and clustered, driving our attention to adaptive cluster sampling and two stage sequential sampling giving readers their theoretical basis and simulated efficiencies evaluation. In our simulation studies, we found that the efficiency of two-stage sequential sampling does not decrease when sample clustering is low. However, the comparison studies show that when sample is rare and clustered, adaptive cluster sampling in the majority of tested cases has better efficiency. At the end of this study, there are recommendations for each situation of knowing rarity and clustering of the population in study.

ASSUNTO(S)

populações agrupadas clustered populations two stage sequential sampling adaptative sampling populações raras amostragem sequencial rare populations amostragem adaptativa populações raras e agrupadas

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