Testing contrasts using group means: Suppose that we wish to test a hypothesis concerning a contrast of group means in a one-way ANOVA: Using Friendly and Franklin’s memory data, verify that the test...

Testing contrasts using group means: Suppose that we wish to test a hypothesis concerning a contrast of group means in a one-way ANOVA: Using Friendly and Franklin’s memory data, verify that the test statistics obtained by the method of this exercise [i.e., in (a) (iii)] are the same as those produced by the incremental sum-of-squares approach, used in the text.