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A study compares the effects of three experimental treatments, A, B, and C, by giving each...

A study compares the effects of three experimental treatments, A, B, and C, by giving each treatment to 16 participants and then assessing their performance on a standard measure. The results on the standard measure are as follows. Treatment A group: M = 20, S2 = 8; Treatment B group: M = 22, S2 = 9; Treatment C group: M = 18, S2 = 7. Using the .01 significance level, do the three experimental treatments create any difference among the populations these groups represent? Use the steps of hypothesis testing.

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