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Components of Variance in Polydrug Use
International Journal of the Addictions, 1981Forty-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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An approximate distribution of estimates of variance components.
Biometrics, 1946F. E. Satterthwaite
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Transformations for components of variance and covariance
Biometrika, 1985SUMMARY 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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Variances of Estimates of Variance Components in a Three-Way Classification
Biometrics, 1966There are a number of procedures for estimating variance components in the case of unbalanced data by equating certain mean squares to their respective expectations. Variances of the resulting estimates are derived for one such procedure applied to a three-way classification. The variances are obtained by a procedure based on the work of Searle [1956].
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1987
We have seen that we can equate the phenotypic value of an individual to the sum of the effects of its genotype and environment: $${P_{ij}} = \mu m + {G_i} + {E_{ij.}}$$ (38.1)
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We have seen that we can equate the phenotypic value of an individual to the sum of the effects of its genotype and environment: $${P_{ij}} = \mu m + {G_i} + {E_{ij.}}$$ (38.1)
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Variance Components (Components of Variance, VC)
2004Steven Wiltshire, Mark I. McCarthy
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