摘要:

AbstractA calibration situation is considered where the calibration data are split into subsets with good linear relationship between y and x within each group. Different strategies for good prediction in this case are proposed. Modifications for collinear data are considered and a simple simulated data set is used for illustration.

ISSN:0886-9383    

DOI:10.1002/cem.1180050603

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractStudies of interactions among bioactive compounds are often difficult to interpret unambiguously.A prioriassumptions about the nature of such interactions can seriously distort analysis of the data. By applying a rank order analysis appropriate to the naturally ordinal scale of response to xenobiotic insult, several co‐herbicides were successfully identified from among numerous candidates in an experiment involving multiple blocks, rates and species. Moreover, underlying herbicide interactions were substantiated and identified which were not apparent by more traditional parametric analysi

ISSN:0886-9383    

DOI:10.1002/cem.1180050604

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractComparison of methods is a technique often used for investigation of systematic errors of measurement methods. As concerns the design and analysis of such comparisons, much variety of opinion and practice exists. In one approach a few specimens are measured several times by different operators in different laboratories (reproducibility conditions) and in another approach several specimens are measured on one or a few occasions by one operator in the same laboratory (repeatability conditions). In this paper a model for the error structure of measurements is formulated and it is emphasized that one has to distinguish between two types of systematic errors: the first type depends only on the level of the measured quantity and the second type is specific for the separate specimens. On the basis of this model the information which can be obtained from the different designs of method comparisons is discussed. A new approach for the analysis of method comparisons with many specimens is also proposed.

ISSN:0886-9383    

DOI:10.1002/cem.1180050605

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

ISSN:0886-9383    

DOI:10.1002/cem.1180050606

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

ISSN:0886-9383    

DOI:10.1002/cem.1180050607

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

ISSN:0886-9383    

DOI:10.1002/cem.1180050608

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

ISSN:0886-9383    

DOI:10.1002/cem.1180050602

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY