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Cochran test Terms

The general principles of testing chemical homogeneity of solids are given e.g. by Malissa [1973], Cochran [1977], and Danzer et al. [1979]. The terms of variation o20tal and o2nal can be separated by analysis of variance (Sect. 5.1.1). According to Danzer and Kuchler [1977] there exists an exponential dependence between the total variance and the reciprocal sample mass... [Pg.46]

In 1985, the United States Federal Register recommended that the analysis of tumor incidence data be carried out with a Cochran-Armitage (Armitage, 1955 Cochran, 1954) trend test. The test statistic of the Cochran-Armitage test is defined as this term ... [Pg.893]

The ISO 5725 standard was used to interpret the data. Even if the main purpose of this standard is related to the validation of a method, it can be used to evaluate some components of the measurement uncertainty. The homogeneity of the population of results, in terms of mean and standard deviation was determined using statistical tests (Cochran and Grubbs). A few laboratories were rejected after the tests. Tables 3 and 4 present the comparison of overall performance of laboratories when working with usual and metrological calibrations solutions. [Pg.249]

The term C represents Cochran s test statistic for evaluating within-laboratory consistency, given in... [Pg.312]

Cochran s Q test is used to evaluate if consumers detected significant differences among samples for each of the terms from the CATA question. Cochran s Q test is a... [Pg.233]

Table 11.2 Example of the data matrix used for analysing data from one term of a check-all-that-apply (CATA) question using Cochran s Q test... Table 11.2 Example of the data matrix used for analysing data from one term of a check-all-that-apply (CATA) question using Cochran s Q test...
According to Cochran s Q test, significant differences (p < 0.05) in the frequency with which 17 of the 18 terms of the CATA question were used to describe the yoghurt samples, suggested that consumers perceived differences in the sensory characteristics of the evaluated yoghurts. [Pg.237]


See other pages where Cochran test Terms is mentioned: [Pg.893]    [Pg.940]    [Pg.61]    [Pg.128]    [Pg.234]    [Pg.234]   


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