摘要:

AbstractThis paper presents some results arising out of the collaboration during 1974–1980 between an ornithologist (the first author) and a statistician. Attention is focussed on the question as to whether Tables 1 and 2 provide sufficient evidence for the existence of effects of recreation upon the numbers of oyster‐catcher nests and on the estimation of these effects by means of confidence intervals. The main tool is the standard theory for constructing conditional tests for multiparameter exponential families. The authors try to give a very careful description of the methodological aspects of their case. Many different probabilistic models can be proposed. Accordingly the statistical problems concerning tests and confidence intervals admit different mathematical formulations and (or) solutions.It is now apparent that, during their collaboration, the authors did not always make the most appropriate choice of models and procedures. They went through several stages before arriving at the choices which are basic to the sections 2, …, 5. By outlining these stages in Section 6 and mentioning the methodological errors which were committed they hope that readers will beware of similar pit

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1981.tb00716.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

AbstractThe simplex method for linear programming has always been very successful from a practical point of view. In the worst case, however, the method may require a computational effort that increases exponentially with problem size. Recently L.G. Khachianproposed an entirely different solution method whose running time is bounded by a polynomial function of problem size, thereby settling a major open problem in computational complexity theory. We review the developments preceding Khachian's discovery, describe the algorithm and discuss its implications.

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1981.tb00717.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

AbstractAll signed rank tests are proved to have the same optimal BAHADUR efficiency, when the alternative tends to infinity. This result underlines the significance of the classical approach of comparing rank tests under local alternatives (comp. KREMER [7], [8]).

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1981.tb00718.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1981.tb00719.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1981.tb00720.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1981.tb00721.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

ISSN:0039-0402    

DOI:10.1111/j.1467-9574.1981.tb00722.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY