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Further results on discrete mean past lifetime. (English) Zbl 1338.60047

Summary: The present paper aims at studying the mean past lifetime of a discrete random variable. The notion of discrete mean past lifetime is studied in relation to the concepts of reversed hazard rate, reversed lack of memory property, and cumulative past entropy. New classes of distributions characterized by particular forms of discrete mean past life are also investigated. Implications of an increasing mean past lifetime on other reliability notions are studied and finally some bivariate generalizations are discussed.

MSC:

60E15 Inequalities; stochastic orderings
62E10 Characterization and structure theory of statistical distributions
62N05 Reliability and life testing
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