Asian Transactions on Basic & Applied Sciences

Volume: 05, Issue: 06, December 2015
ISSN 2221-4291


Title: An Empirical Comparison of Parametric and Non Parametric Survival Longevity Models: A Case Study of University Of Ibadan and Obefemi Awolowo University
Author(s): Moses Adedapo Ajayi, Keoagile Thaga, Dahud K. Shangodoyin, Lucky Mokgatlhe
Paper ID: ATBAS-15060671
Pages: 1 - 9
Abstract: This study compares the basic concepts, nonparametric and parametric methods with derived longevity model (DLM) for analyzing cohort data. University academic retirees' data from two Universities from Western Nigeria were the basis of the study. Estimated mean of post retirement years for Universities retirees using conventional method is 18.33 years and DLM using Kaplan Meier Model is 21.59 years, with the effect of explanatory variables estimated mean of post retirement years is 21.67 years using Cox proportional Model. The estimated mean for post retirement years from DLM using Exponential, Weibull and Gumpertz Models without the effect of explanatory variables are 22.66, 22.35 and 22.08 years respectively. The estimated mean for post retirement years for these institutions with the effect of explanatory variables using Exponential, Weibull and Gumpertz Models are 22.78, 22.82 and 22.48 years respectively. We can recommend DLM for reliability, maintainability, and safety (RMS) work.

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