Mathematical Problems in Engineering 
Volume 2005 (2005), Issue 1, Pages 101-111
doi:10.1155/MPE.2005.101

Reliability for some bivariate beta distributions

Saralees Nadarajah

Department of Statistics, University of Nebraska, Lincoln 68583, NE, USA

Received 24 June 2004

Abstract

In the area of stress-strength models there has been a large amount of work as regards estimation of the reliability R=Pr(X<Y). The algebraic form for R=Pr(X<Y) has been worked out for the vast majority of the well-known distributions when X and Y are independent random variables belonging to the same univariate family. In this paper, we consider forms of R when (X,Y) follows a bivariate distribution with dependence between X and Y. In particular, we derive explicit expressions for R when the joint distribution is bivariate beta. The calculations involve the use of special functions.