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Monitoring Variance Components
Technometrics, 1994This article discusses methods for monitoring a process in which the variance of the measurements is attributed to several known sources of variability. For example, in the case of integrated circuit fabrication one is typically interested in monitoring the process mean as well as the lot-to-lot, wafer-to-wafer-within-lot, and within-wafer components ...
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2005
Abstract In this chapter we consider GLMs with shared random effectsarising through variance component or repeated measures structure, for example, in two-stage sample designs, or longitudinal data. As we will see, the analysis of these models closely parallels that for overdispersion models, with slightly greater complexity in the EM ...
Murray Aitkin, Brain Francis, John Hinde
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Abstract In this chapter we consider GLMs with shared random effectsarising through variance component or repeated measures structure, for example, in two-stage sample designs, or longitudinal data. As we will see, the analysis of these models closely parallels that for overdispersion models, with slightly greater complexity in the EM ...
Murray Aitkin, Brain Francis, John Hinde
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Variance components of gingival thickness
Journal of Periodontal Research, 2005Objectives: Distinct periodontal phenotypes have been identified by cluster analysis, which is an explorative method with very low external validity. The aim of the present study was to investigate variance components of facial gingival thickness in young adults with mild gingivitis.Material and methods: Thirty‐three non‐smoking females, 18–23 years ...
H P, Müller, E, Könönen
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Variance-Importance of System Components
IEEE Transactions on Reliability, 1982The paper defines the variance-importance of a component as the product of a relative sensitivity coefficient of component variance and the variance of component-unreliability estimate. Variance-importance is useful for identifying components that appreciably contribute to the uncertainty of system unreliability.
Nakashima, Kyoichi, Yamato, Kazuharu
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Variance of Heritability Ratios Estimated from Phenotypic Variance Components
Biometrics, 1972Heritability ratios are considered from observations on genotypes grown in a series of environments, sampling sites, and years. Two random models, appropriate to randomised complete block designs, are examined: one classifying the environments into sites and years, the other not distinguishing between these effects but considering both simply as ...
I L, Gordon, D E, Byth, L N, Balaam
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On estimation of variance components*
Statistica Neerlandica, 1980SummaryIn this survey paper the estimation of variance components is given. The least squares approach in variance component estimation is a unifying principle which includes the analysis of variance estimators and the MINQUE. When normality is assumed the maximum likelihood estimators can be used. Many variance component estimators are not permissible
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Components of variance: a miscellany
Statistical Methods in Medical Research, 1998Some general issues connected with components of variance are reviewed. These include matters of definition, of formal inference in a normal-theory context, of goodness of fit, and of simple methods for unbalanced data.
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Exact Tests for Variance Components
Biometrics, 1996Summary: \textit{J. Öfversten} [ibid. 49, No. 1, 45-57 (1993; Zbl 0771.62053)] presented two kinds of exact \(F\)-tests for variance components in unbalanced mixed linear models. Specifically, methods were developed for models with one random factor, nested classifications, and models with interaction between random factors.
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