Suppose you are manufacturing concrete cylinders for, say, bridge supports. There are three ways of drying green concrete (say A. B. and C), and you want to find the one that gives you the best compressive strength. The concrete is mixed in batches that are large enough to produce exactly three cylinders, and your production engineer believes that there is substantial variation in the quality of the concrete from batch to batch. Your measurements are the compressive strength of the cylinder in a destructive test. Batch ... Treatment 2 3 4 A 52 47 44 51 42 B 60 55 49 52 43 56 48 45 44 38 a. Complete the ANOVA table. b. At 0.01 significance level, test whether there is a difference in compressive strength between the treatments.

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