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1. (Prob. 13-54, p. 571) An article in Lubrication Engineering (December 1990) described the results of an experiment designed to investigate the effects of carbon material properties on the progression of blisters on carbon face seals. The carbon face seals are used extensively in equipment such as air turbine starters. Five different carbon materials were tested, and the surface roughness was measured. The data are as follows: 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 ECI 0.10 0.16 (a) Does carbon material type have an effect on mean surface roughness? Use a = 0.05. (b) Find the residuals for this experiment. Does a normal probability plot of the residuals indicate any problem with the normality assumption? (c) Plot the residuals versus y. Comment on the plot. roughnOss for the

1. (Prob. 13-54, p. 571) An article in Lubrication Engineering (December 1990) described the results of an experiment designed to investigate the effects of carbon material properties on the progression of blisters on carbon face seals. The carbon face seals are used extensively in equipment such as air turbine starters. Five different carbon materials were tested, and the surface roughness was measured. The data are as follows: 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 ECI 0.10 0.16 (a) Does carbon material type have an effect on mean surface roughness? Use a = 0.05. (b) Find the residuals for this experiment. Does a normal probability plot of the residuals indicate any problem with the normality assumption? (c) Plot the residuals versus y. Comment on the plot. roughnOss for the

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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pls only answer b-d. I am having a hard time plotting residuals to letter b could you please explain it also. Thank you very much

1. (Prob. 13-54, p. 571) An article in Lubrication Engineering (December 1990) described the results of an experiment designed to investigate the effects of carbon material properties on the progression of blisters on carbon face seals. The carbon face seals are used extensively in equipment such as air turbine starters. Five different carbon materials were tested, and the surface roughness was measured. The data are as follows: 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 ECI 0.10 0.16 (a) Does carbon material type have an effect on mean surface roughness? Use a = 0.05. (b) Find the residuals for this experiment. Does a normal probability plot of the residuals indicate any problem with the normality assumption? (c) Plot the residuals versus y. Comment on the plot. (d) Find a 95% confidence interval on the difference between mean EC10 and the EC1 carbon grades. urface roughness for the
Transcribed Image Text:1. (Prob. 13-54, p. 571) An article in Lubrication Engineering (December 1990) described the results of an experiment designed to investigate the effects of carbon material properties on the progression of blisters on carbon face seals. The carbon face seals are used extensively in equipment such as air turbine starters. Five different carbon materials were tested, and the surface roughness was measured. The data are as follows: 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 ECI 0.10 0.16 (a) Does carbon material type have an effect on mean surface roughness? Use a = 0.05. (b) Find the residuals for this experiment. Does a normal probability plot of the residuals indicate any problem with the normality assumption? (c) Plot the residuals versus y. Comment on the plot. (d) Find a 95% confidence interval on the difference between mean EC10 and the EC1 carbon grades. urface roughness for the
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