Then, with the concept of accumulated failure probability, the proposed approach combines the least ? quares method with bayes " theorem, takes advantage of the parameter estimation for single weibull distribution to each derived subgroup data set, and estimates the parameters of each subpopulation . the estimates given by this paper also satisfy the maximum likelihood equation . the mean time to failure and the reliability estimation of the mixed population are given 然后通過(guò)利用累積失效概率等概念,對(duì)每個(gè)導(dǎo)出的子組數(shù)據(jù)集聯(lián)合運(yùn)用最小二乘法、貝葉斯定理和對(duì)單一威布爾分布的參數(shù)估計(jì)法,從而得到每個(gè)子總體的滿(mǎn)足極大似然原理的參數(shù)估計(jì),給出了該混合總體平均壽命和可靠度的估計(jì)。