Results 221 to 230 of about 779,832 (257)

Variance components of gingival thickness

Journal of Periodontal Research, 2005
Objectives:  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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Components of Variance in Polydrug Use

International Journal of the Addictions, 1981
Forty-seven people who first attended any London drug clinic in 1971 were asked at what age they first used various drugs and how frequently each was used during every subsequent year. For age of first use, substantial significant variance components due both to drugs and subjects and to the interaction between them confirmed that certain substances ...
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Exact Tests for Variance Components

Biometrics, 1996
Summary: \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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Variance Components

Journal of Marketing Research, 1993
Peter H. Westfall, S. R. Searle, G. Casella, C. E. McCulloch   +3 more
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Variance Components and Disconnected Data

Biometrics, 1978
Summary It has been suggested that disconnected data pose problems in variance component estimation and that the dlscarding of certain sections of a data set is a possible solution. In contrast, it is shown in this paper that estimators of variance components can be derived from disconnected data by applying Henderson's Method III without modification.
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Transformations for components of variance and covariance

Biometrika, 1985
Variance component models make various independence assumptions and typically assume effects are normally distributed. Here we assume that the data, possibly after suitable transformation, satisfy such a model. An analysis of transformations for balanced variance component models is presented, components of covariance being incorporated in the ...
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Variance Components (Components of Variance, VC)

2004
Mark McCarthy, Steven Wiltshire
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Components of Variance

2002
Cox, D., Solomon, P.
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Components of Variance.

Biometrics, 2004
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The Estimation of the Variances in a Variance-Components Model

International Economic Review, 1971
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