摘要:

We are forced to accept as [an] alternative that the random spinning of a roulette manufactured and daily readjusted with extraordinary care is not obedient to the laws of chance, but is chaotic in its manifestations!

ISSN:0162-1459    

DOI:10.1080/01621459.1982.10477869

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

We consider a class of two-sample distribution-free tests that are appropriate for situations where one of the sample sizes is large relative to the other. These procedures are based on the placements of the observations in the smaller sample among the ordered observations in the larger sample, and this class of tests generalizes the Mann-Whitney (1947) procedure in much the same way that the class of linear rank tests generalizes the equivalent Wilcoxon (1945) rank sum form. Optimality criteria for choosing a test from this class are discussed and limiting distributions for the associated class of test statistics are determined for the case where only one of the sample sizes goes to infinity.

ISSN:0162-1459    

DOI:10.1080/01621459.1982.10477870

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

A method for constructing upper confidence limits (UCL's) for parametric functions of typeg(λ) = ΣjΠi∈Ijλiis considered. It is based on maximization ofg(λ) over a confidence set of type {λ | ΣλiTi≤ Λα& λi≥ 0} obtained by pooling statistical data received from separate testing of system components. An asymptotic representation of the reliability function of an arbitrary coherent system is given assuming that the element failure rates are low. It has the formR(t) ≈ 1 - exp (–trg(λ)) and, therefore, a UCLg* forg(λ) provides a lower confidence limit (LCL) forR(t). Explicit formulas are presented for parallel, series-parallel, andk-out-of-nsystems, for two types of statistical test data, namely, testing over a given time period and testing until a prescribed number of failures appear. The performance of the method is discussed in terms of two characteristics: the average value ofg*/g(λ) and the true confidence coefficientP{g* ≥g(λ)}.

ISSN:0162-1459    

DOI:10.1080/01621459.1982.10477871

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Dwyer (1967) provided extensive formulas for matrix derivatives, many of which are for derivatives with respect to symmetric matrices. The results of his article are only for symmetric matrices whose (j, i) element is considered to differ from the (i, j) element even though their scalar values are equal. A simple result is given that extends the use of Dwyer's formulas to symmetric matrices in which the (i, j) element is considered functionally equal to the (j, i) element. Application of the results are illustrated by deriving the multivariate normal information matrix.

ISSN:0162-1459    

DOI:10.1080/01621459.1982.10477872

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The Costs of Higher Education: How Much Do Colleges and Universities Spend Per Student and How Much Should They Spend?: Howard R. Buwen. San Francisco, Calif.: Jossey-Bass, 1980, xxiii + 287 pp. $15.95 (paperback). Reviewed by: Werner Z. Hirsch

ISSN:0162-1459    

DOI:10.1080/01621459.1982.10477873

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

This article has no abstract

ISSN:0162-1459    

DOI:10.1080/01621459.1982.10477838

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor