Question: (b) Analyse the data by the analysis of variance and by mixed modelling, making the assumption that the bulls studied have been chosen at random

(b) Analyse the data by the analysis of variance and by mixed modelling, making the assumption that the bulls studied have been chosen at random from a population of similar animals. Perform the best available test to determine whether the variation among bulls is significant.

The data are percentages based on slightly different numbers of tests: the assumption, made in the analyses specified in Part (b), that the variance among samples within each bull is constant is therefore not quite correct.

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