【摘要】 处理生存分析观测数据使用的参数估计方法有很多,极大似然估计法是最常见的一种估计方法。当寿命分布为指数分布时,给出了定时截尾数据、定数截尾数据情形的极大似然估计,以及随机右删失下参数极大似然估计的一般表达式。此外,还提出了分组数据场合参数极大似然估计的图解求法。更多还原

【Abstract】 There are many methods to deal with measuring data in survival analysis. Maximum likelihood estimation is the most popular one. Under exponential distribution,maximum likelihood estimators of the parameter for Type-I censored data and Type-II censored data are obtained,and a general expression of maximum likelihood estimator for right randomly censoring data is also derived. Moreover,a graphical method is developed to solve maximum likelihood estimation of paremeter for Packet censored data.更多还原