ON RELIABILITY APPROACH AND STATISTICAL INFERENCE IN DEMOGRAPHY
In demography, Gompertz and Makeham models have significant role in modeling and in analysis of mortality and ageing. Till the end of the 20th century, researchers have used the tables of mortalities (also called life tables) for demographic analysis but in the end of the 20th century due to the development in statistical methods of survival analysis and reliability one can treat the individuals data even with the information of censoring. The Gompertz, Makeham, and Weibull models are compared with respect to the goodness-of-fit to the table of mortality and to the individuals data in the presence of censoring. For data from the table of mortality, the test statistic considered by Gerville-Reache and Nikulin (2000) is used. For censored individual data the chi-squared type test proposed by Bagdonavicius et al. (2010) is used.