ISSN:0266-4763    

DOI:10.1080/02664768800000001

出版商:Carfax Publishing Company    

年代:1988

数据来源: Taylor

摘要:

This paper reviews the potential of biometrics for the design of biological, medical and environmental research and, the interpretation of research results, and contrasts this potential with what has actually been achieved in improving standards of scientific research. It concludes that the successful development of biometrics will require us to look carefully at present and future practices in the planning and conduct of research, with particular emphasis on the responsibilities of senior research managers, on our communication of statistical theory, and on the use of computers.

ISSN:0266-4763    

DOI:10.1080/02664768800000002

出版商:Carfax Publishing Company    

年代:1988

数据来源: Taylor

摘要:

Forecasting methods are reviewed. They may be classified into univariate, multivariate and judgemental methods, and also by whether an automatic or non-automatic approach is adopted. The choice of ‘best’ method depends on a wide variety of considerations. The use of forecasting competitions to compare the accuracy of univariate methods is discussed. The strengths and weaknesses of different univariate methods are compared, both in automatic and non-automatic mode. Some general recommendations are made as well as some suggestions for future research.

ISSN:0266-4763    

DOI:10.1080/02664768800000003

出版商:Carfax Publishing Company    

年代:1988

数据来源: Taylor

摘要:

A number of results have been derived recently concerning the influence of individual observations in a principal component analysis. Some of these results, particularly those based on the correlation matrix, are applied to data consisting of seven anatomical measurements on students. The data have a correlation structure which is fairly typical of many found in allometry. This case study shows that theoretical influence functions often provide good estimates of the actual changes observed when individual observations are deleted from a principal component analysis. Different observations may be influential for different aspects of the principal component analysis (coefficients, variances and scores of principal components); these differences, and the distinction between outlying and influential observations are discussed in the context of the case study. A number of other complications, such as switching and rotation of principal components when an observation is deleted, are also illustrated.

ISSN:0266-4763    

DOI:10.1080/02664768800000004

出版商:Carfax Publishing Company    

年代:1988

数据来源: Taylor

摘要:

Intercropping is an important farming system, especially in tropical regions. A statistical model with competition coefficients and correlated error structure is suggested for the analysis of data from intercropping experiments involving two crop species. Data from an intercropping experiment with pearl millet and sorghum genotypes are used to illustrate the technique.

ISSN:0266-4763    

DOI:10.1080/02664768800000005

出版商:Carfax Publishing Company    

年代:1988

数据来源: Taylor

摘要:

A capture-recapture sampling plan is defined for estimating the number of defects in one or more products. This sampling plan will be useful in applications where every defect cannot be detected with complete certainly.

ISSN:0266-4763    

DOI:10.1080/02664768800000006

出版商:Carfax Publishing Company    

年代:1988

数据来源: Taylor

摘要:

Multiple discriminant analysis (MDA) is a frequently used statistical technique. Although the dependence of this technique on the underlying assumptions concerning population priors and misclassification costs is well known, the assumption most often made by researchers is that both population priors and misclassification costs are equal. The purpose of this paper is to demonstrate the magnitude of the effect of these assumptions on statistical results. In the savings and loan case used here, the population priors are known:however, the relative misclassification costs are not. To test the sensitivity of the results to the unknown misclassification costs several different misclassification cost assumptions are used.

ISSN:0266-4763    

DOI:10.1080/02664768800000007

出版商:Carfax Publishing Company    

年代:1988

数据来源: Taylor

摘要:

The use of graphical methods in the classroom can enhance the learning of multiple regression analysis. The technique of adjusted variables is presented as a method by which the effects of multicollinearity and of variable selection can be displayed so that students in the applications curricula can understand some of the subtleties of regression modelling.

ISSN:0266-4763    

DOI:10.1080/02664768800000008

出版商:Carfax Publishing Company    

年代:1988

数据来源: Taylor

ISSN:0266-4763    

DOI:10.1080/02664768800000009

出版商:Carfax Publishing Company    

年代:1988

数据来源: Taylor

ISSN:0266-4763    

DOI:10.1080/02664768800000011

出版商:Carfax Publishing Company    

年代:1988

数据来源: Taylor