Back then I used the notation μ P to refer to the mean mood gain for the placebo group, with μ A and μ J corresponding to the group means for the two drugs, and the null hypothesis was μ P =μ A =μ J ....Back then I used the notation μ P to refer to the mean mood gain for the placebo group, with μ A and μ J corresponding to the group means for the two drugs, and the null hypothesis was μ P =μ A =μ J . So we’re actually talking about the same hypothesis: it’s just that the more complicated ANOVA requires more careful notation due to the presence of multiple grouping variables, so we’re now referring to this hypothesis as μ 1 . =μ 2 . =μ 3 . . However, as we’ll see shortly, although the hypothesi…
