Jairo Alberto Fúquene & Leonardo Bautista
Abstract
In probability proportional-to-size designs (P.P.S.)
the selection probabilities that minimize the approximate variance of a totals ratio
for dichotomic variables-dicho–ratio are found and their efficiency is compared
with respect to S.I. design.
Key words: Auxiliary categorical information, Totals
ratio estimation, Dicho-ratio, p.p.s. design, Dichotomic variables.
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(Spanish)