More on ANOVA: Answers | Saylor Academy

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Rejecting the null hypothesis only indicates that at least one population mean is different from at least one other.
The mean of the means of one variable averaging over the levels of another variable.
Marginal means
A specific comparison
Tukey's test
Main effects. The interaction means the simple effects differ and therefore the main effect does not tell the whole story.
False, because it is not valid to accept the null hypothesis that a simple effect is 0 when it is not significant.