In Design and Analysis of Experiments, 7th edition (John Wiley & Sons, 2009), D. C
Chapter 13, Problem 13-38(choose chapter or problem)
In Design and Analysis of Experiments, 7th edition (John Wiley & Sons, 2009), D. C. Montgomery described an experiment that determined the effect of four different types of tips in a hardness tester on the observed hardness of a metal alloy. Four specimens of the alloy were obtained, and each tip was tested once on each specimen, producing the following data:(a) Is there any difference in hardness measurements between the tips? (b) Use Fishers LSD method to investigate specific differences between the tips. (c) Analyze the residuals from this experiment.
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