PSYCH 100A Lecture Notes - Lecture 13: Null Hypothesis, Sampling Distribution, John Tukey
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Difference between the largest mean and the lowest mean. S(xbar) = standard error of the sampling distribution. If n is the same for all groups. To get ms within, just add these values up and divide by three because there are three groups. For any dfw, as dfb goes up, f critical value goes down. For any dfb, as dfw goes up, f critical value goes down. Psychology is based on variance and differences between two subjects. To explain that people vary from some average. Total: the difference between between groups and within groups. Between: the difference between each group mean and the grand mean squared. After rejecting the omnibus null hypothesis in anova, then you have to follow up and see which in particular group means are significantly different from each other. If you fail to reject the null hypothesis, you don"t have to do this. We cannot do a bunch of two-group tests because.
