An article in the IEEE Transactions on Components, Hybrids, and Manufacturing Technology
Chapter 13, Problem 13-45(choose chapter or problem)
An article in the IEEE Transactions on Components, Hybrids, and Manufacturing Technology (Vol. 15, No. 2, 1992, pp. 146153) described an experiment in which the contact resistance of a brake-only relay was studied for three different materials (all were silver-based alloys). The data are as follows. yij Carbon Material Type Surface Roughness EC10 0.50 0.55 0.55 0.36 EC10A 0.31 0.07 0.25 0.18 0.56 0.20 EC4 0.20 0.28 0.12 EC1 0.10 0.16 Alloy Contact Resistance 1 95 97 99 98 99 99 99 94 95 98 2 104 102 102 105 99 102 111 103 100 103 3 119 130 132 136 141 172 145 150 144 135 (a) Does the type of alloy affect mean contact resistance? Use 0.01. (b) Use Fishers LSD method to determine which means differ. (c) Find a 99% confidence interval on the mean contact resistance for alloy 3. (d) Analyze the residuals for this experiment.
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