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Download pdf guide - VSN International

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ContentsvIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Direct product structures . . . . . . . . . . . . . . . . . . . . . . . 7Variance structures for the errors: R structures . . . . . . . . . . . 9Variance structures for the random effects: G structures . . . . . . 102.2 Estimation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Estimation of the variance parameters . . . . . . . . . . . . . . . . 11Estimation/prediction of the fixed and random effects . . . . . . . 142.3 What are BLUPs? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152.4 Combining variance models . . . . . . . . . . . . . . . . . . . . . . . 162.5 Inference: Random effects . . . . . . . . . . . . . . . . . . . . . . . . 17Tests of hypotheses: variance parameters . . . . . . . . . . . . . . 17Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182.6 Inference: Fixed effects . . . . . . . . . . . . . . . . . . . . . . . . . . 19Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Incremental and Conditional Wald Statistics . . . . . . . . . . . . . 20Kenward and Roger Adjustments . . . . . . . . . . . . . . . . . . 24Approximate stratum variances . . . . . . . . . . . . . . . . . . . . 243 A <strong>guide</strong>d tour 263.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273.2 Nebraska Intrastate Nursery (NIN) field experiment . . . . . . . . . . 27

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