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Vol. 7 No. 1 (2016)
Enero a Junio

Revisiones/Reviews

Application of the Copula-Graphic Estimator in Juvenile Bocachico Prochilodus Magdalenae Subjected to Different Levels of Salinity.

https://doi.org/10.19053/01217488.4235

Published 2016-02-15

  • O. Bru Cordero
    • ,
  • H. Brango García
    • ,
  • M. C. Jaramillo Elorza
    • ,
  • M. P. López

Abstract

In this paper, it is estimated the role of survival under dependence using the copula-graphic estimator
proposed by [2]. A simulation study is carried out for Weibull failure times, with two failure modes and
different percentages of censorship, where the survival function is compared through the copula-graphic
estimator, with the survival estimation assuming independence from two failure modes. It is shown a study application carried out in the Fishing Research Center of the University of Cordoba-CINPIC (Colombia), in which the mortality of juvenile fish subjected to different levels of salinity is wanted to be analyzed, and what constitutes the failure modes or causes of death (10 ppm and 12 ppm). It was found that assuming independence in the failure modes the survival function, underestimates the true survival rate, which is estimated in a reliable manner with the estimator copula graphic, in which the dependency between the failure modes is taken into account.

Keywords

Estimador cópula gráfico, censura, función de superviencia. (Censored, Estimator Copula-Graphic, Survival Function.)

PDF (Español)

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