Simple Effects Following a significant interaction, follow-up tests are usually needed to explore the exact nature of the interaction. Simple effects (sometimes called simple main effects) are differences among particular cell means within the design. More precisely, a simple effect is the effect of one independent variable within one level of a second independent variable. In our hypothetical ...

The most noteworthy contrasts between the two reactions are the requirement for catalytic amounts of an appropriate derivative of glutamic acid in the case of the liver system, and the difference in stoichiometry with respect to nucleotides. As predicted from thermodynamics the bacterial system is freely reversible; the liver system is not. In this paper, evidence will be presented that the equ...

This paper develops a test for homogeneity in finite mixture models where the mixing proportions are known a priori (taken to be 0.5) and a common nuisance parameter is present. Statistical tests based on the notion of Projected Likelihood Contrasts (PLC) are considered. The PLC is a slight modification of the usual likelihood ratio statistic or the Wilk’s Λ and is similar in spirit to the Rao’...