INADMISSIBILITY OF THE USUAL ESTIMATOR FOR THE LOCATION PARAMETERS OF SPHERICALLY SYMMETRIC DISTRIBUTIONS  

作　　者：范剑青 方开泰 

机构地区：[1]Institute of Applied Mathematics, Academia Sinica, Beijing

出　　处：《Chinese Science Bulletin》1989年第7期533-537,共5页

基　　金：Project supported by the National Natural Science Foundation of China.

摘　　要：I. INTRODUCTIONIt is well-known that the usual estimator, the sample mean, for the mean of a multivariate normal distribution is inadmissible. After the improvement of the original proof, several concise proofs are proposed, referring to Anderson, for example.

关 键 词：INADMISSIBILITY MINIMAX ESTIMATOR QUADRATIC loss spherically symmetric distributions. 

分 类 号：N[自然科学总论]