北京大学学报(自然科学版)

位置尺度分布族中截尾数据的Fisher信息量

王岩华, 何书元, 梅长林   

  1. 北京大学数学学院概率统计系,北京,100871
  • 收稿日期:2002-09-14 出版日期:2003-09-20 发布日期:2003-09-20

Fisher Information for Censored Data from Location Scale Families

WANG Yanhua, HE Shuyuan, MEI Changlin   

  1. School of Mathematical Sciences, Peking University, Beijing, 100871
  • Received:2002-09-14 Online:2003-09-20 Published:2003-09-20

摘要: 证明了混合型截尾数据的渐近Fisher信息矩阵和Ⅰ型截尾数据的Fisher信息矩阵一致。该结果可以推广到一般的对数位置尺度分布族,如Weibull分布、对数正态分布等。

关键词: 混合型截尾, Ⅰ型截尾, Ⅱ型截尾, Fisher信息量

Abstract: Lifetime data with time and failure censoring arises frequently in the controlled lifetime study. The Fisher information matrix IM(θ) of this data is more complex than that of the typeⅠcensored data. For Location-Scale distribution families, we prove that the asymptotic Fisher information IM(θ) equals typeⅠcensored Fisher information matrix. The results can be extended to Log Location-Scale family, such as Weibull and Lognormal distributions.

Key words: time and failure censoring, typeⅠcensoring, type Ⅱ censoring, Fisher information

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