Li, Xiaohu; Li, Zehui; Jing, Bing-Yi - In: Statistics & Probability Letters 46 (2000) 3, pp. 229-237
NBUC class life distributions are dealt with in this paper. Firstly, a lower bound of the reliability function based upon mean and variance (both assumed finite) is presented. It is shown that the bound effectively improves "known bounds" for NBU life distributions. Secondly, a sufficient...