Resumo

FUQUENE P, JAIRO A. Dico-ratio Estimation with Auxiliary Information in 3×3 Contingency Tables. Rev.Colomb.Estad. [online]. 2005, vol.28, n.2, pp.141-154. ISSN 0120-1751.

The S.I, P.P.S, STSI and stratified by the Hidiroglou’ s method to estimate a totals ratio of dichotomic variables are compared. In the P.P.S. design the selection probabilities that make minimum the approximate variance are showed. In the STSI design, in the case of proportional assignment of sample, the efficiency to use the same auxiliary information that in the P.P.S. design one is compared. By simulation, all the designs are compared and is obtained that for a medium or high grade of correspondence between the auxiliary variable and the variable of interest, the estimators for the STSI and P.P.S. designs are more efficient.

Palavras-chave : Auxiliary categorical information; estimation of a totals ratio of dichotomic variables; dicho-ratio; P.P.S. design; STSI design.

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