Computer Optimization for the Mixed Analysis of Variance Model Using Maximum Likelihood.
TEXAS A AND M UNIV COLLEGE STATION
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The W transformation, a matrix transformation, is developed and applied for the mixed analysis of variance model to compute maximum likelihood estimates of the variance components and fixed parameters. This transformation not only eliminates the need for the explicit computation of the n x n inverse matrix 1H but permits handling the iterative calculations such that they do not depend upon n the number of observations in any way. Although not wedded to a particular numerical method, the W transformation is implemented in conjunction with a modified Newton-Raphson method in which variance components are restricted to being non-negative. Author
- Statistics and Probability