Use the data of Table 9€“1 and the Tukey procedure to determine where differences exist among the triangle, circle, and square population means. Use α = 0.01.

In table

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Sample Polnt j Value x Treatment i i Triangle Triangle Triangle Triangle Mean of triangles 1: 2 Square square Square Square 10 12 13 11.5 Mean of squares i 3 Circle Circle Circle Mean of circles Grand mean of all data points 6.909