Titlebook: Statistical Methods: The Geometric Approach; David J. Saville,Graham R. Wood Textbook 1991 Springer Science+Business Media New York 1991 M

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Factorial Contrastssts can be thought of as clever class comparisons. For example, when we analyze Example B we shall firstly contrast the class of “no superphosphate” treatments with the class of “superphosphate” treatments, then move on to contrast the class of “no nitrolime” treatments with the class of “nitrolime”

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Polynomial Contrastsuently the contrasts of interest were comparisons of one class of treatment with another (Chapter 8). In the case of factorial experiments (Chapter 9) the contrasts of interest also included the interactions between factors. Frequently in an experimental situation, however, the treatments are.in nat

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