Answer B, C, D also, not just A. 13-54. O An article in Lubrication Engineering (December1990) described the results of an experiment designed to inves-tigate the effects of carbon material properties on the progres-sion of blisters on carbon face seals. The carbon face seals areused extensively in equipment such as air turbine starters. Fivedifferent carbon materials were tested, and the surface rough-ness was measured. The data are as follows:CarbonMaterial TypeSurface RoughnessEC100.50 0.55 0.55 0.36EC10A0.31 0.070.250.18 0.560.20EC40.20 0.280.12EC10.10 0.16(a) Does carbon material type have an effect on mean surfaceroughness? Use a = 0.05.(b) Find the residuals for this experiment. Does a normal prob-ability plot of the residuals indicate any problem with thenormality assumption?(c) Plot the residuals versus ŷ. Comment on the plot.(d) Find a 95% confidence interval on the difference betweenmean surface roughness for the EC10 and the EC1 carbongrades.

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s of carbon material p on carbon face seals. in equipment such a materials s were tested

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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