摘要:

AbstractIn the present paper, the two‐factor‐two‐level disease risk case is briefly reviewed. We have defined, what we call, the marginal effect of an agent. This is the effect of an agent in the presence of a second agent. It is noted that the two agents are synergistic (or that synergism is present) if the marginal effect of an agent exceeds its individual effect. The differenceME(A) — E(Aalone) is called the effectSAof an agent. A simple relationship has been established between the effectsSAandSBof the two agents and the HOGAN et al. (1978) measureD(also called the Interaction Contrast Disease Rate (ICDR) by HAMILTON (1979)). This relationship shows that there can be no assymmetries at the two dichotomous risk level.This discussion is extended to two disease risks each at several levels and to several disease risks each at several levels. In each case, a simple relationship has been established between the ICDR and the effectsSAi(i= 1, 2,…,k) of these disease risks. Several numerical examples are worked out to illustrate t

ISSN:0323-3847    

DOI:10.1002/bimj.4710260702

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

ISSN:0323-3847    

DOI:10.1002/bimj.4710260703

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractBounds on the eigenvalue of theC‐matrix with respect toRand the number of blocks for efficiency‐balanced block designs are given.AMS 1970 Subject Classification: 6

ISSN:0323-3847    

DOI:10.1002/bimj.4710260704

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractIn supplementation of the work by ABT (1977, 1982) and ACKERMANN (1980, 1983) extensive ta.bles and approximite formulae are provided for the determination of the sample size for constructing “inner” and “outer” limits of non‐parametric multivariate toleranc

ISSN:0323-3847    

DOI:10.1002/bimj.4710260705

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractIf {Ui}i= 1, …,kis a sequence of binary responses ofnisubjects at each ofksuccessive dose levelsxi, there is the problem of the statistical treatment of the observed proportionsPi=Ui/niwhen neither the probit nor the logit transformation may be assumed.This paper considers the use of the midranks of the responses for point and interval estimation of relative potency in the case of parallel line assay in particular. More generally the problem of combining the results of several independent estimates using ranks is discussed. Several examples illustrate the metho

ISSN:0323-3847    

DOI:10.1002/bimj.4710260706

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

ISSN:0323-3847    

DOI:10.1002/bimj.4710260707

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractIn the present paper we present an example proving that the Varimax rotation method commonly used in factor analysis (see H. F. KAISER, 1958) need not give a unique solution. We also show that changing the original algorithm more than one local maximum of the criterion “V” can be achieved. Hence the loadings of factors and practical interpretations of solutions are affected in this

ISSN:0323-3847    

DOI:10.1002/bimj.4710260708

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractFor the estimation of the population mean in stratified random sampling a ‘Combined Product Estimator’ is proposed which is more efficient than the ‘Combined Ratio’ and ‘Separate Ratio’ estimators. Also, the proposed estimator have exact expressions for bias and mean square error. An empirical illustration is given to compare the efficiencies of different

ISSN:0323-3847    

DOI:10.1002/bimj.4710260709

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

ISSN:0323-3847    

DOI:10.1002/bimj.4710260710

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY

摘要:

AbstractJeffreys' approach for analyzing a 2×2‐table is discussed via a Monte Carlo study. The main findings are report

ISSN:0323-3847    

DOI:10.1002/bimj.4710260711

出版商:WILEY‐VCH Verlag    

年代:1984

数据来源: WILEY