An article in Quality Engineering [Estimating Sources of Variation: A Case Study from Polyurethane Product Research (19992000,)]
Question:
(a) Is there a difference in the cross-linker level? Draw comparative box plots and perform an analysis of variance. Use α = 0.05.
(b) Find the P-value of the test. Estimate the variability due to random error.
(c) Plot average domain spacing against cross-linker level and interpret the results.
(d) Analyze the residuals from this experiment and comment on model adequacy.
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Related Book For
Applied Statistics And Probability For Engineers
ISBN: 9781118539712
6th Edition
Authors: Douglas C. Montgomery, George C. Runger
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