Question: In the preceding problem the three sample means are close together there are no significant mean differences. To construct the following data, we started with the scores in problem 9, then increased the size of the mean differences. Specifically we lowered the smallest mean by subtracting 2 points from each score in treatment I, and we increased the largest mean by adding 2 points to each score in treatment III. As a result the three sample means are now much more spread out.

1. Use the ANOVA with α=.05 to determine whether there are any significant differences among the three treatments.
2. Compute for these data.

Treatment
I	II	III
0	3	9	N=12
4	7	7	G=30
0	6	6	=408
4	4	10
M=2 SS=16	M=5 SS=10	M=8 SS=10

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