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An article in Quality Engineering ["Estimating Sources of Variation: A Case Study from Polyurethane Product Research" (1999-2000, Vol. 12, pp. 89-96)] studied the effects of additives on final polymer properties. In this case, polyurethane additives were refferred to as cross-linkers. The average domain spacing was the measurement of the polymer property. the data are as follows:

Cross-Linker Level
Domain Spacing (nm)
-1
9.3
99.4
8.99.5
9.1
-0.75
9.4
9.2
9.8
9.59.2
9
-0.5
9.6
9.29.49.8
99.1
09.59.49.29.29.79.8
0.5
9.8
8.29.39.3
8.810.1
1
9.4
9.7
9.5
9.9
9.29.2

Is there a difference in the cross-linker level? Perform an analysis of variance. Use alpha=0.05

Engineering-C   Civil-Eng   
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Answer #1

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answered by: merlin
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