Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 30 Nov 2017 My Price 6.00

ceramic ball

9.     Artificial joints consist of a ceramic ball mounted on a taper. The article “Friction in Orthopaedic Zirconia Taper Assemblies” (W. Macdonald, A. Aspenberg, et al., Proceedings of the Institution of Mechanical Engineers, 2000: 685–692) presents data on the coefficient of friction for a push-on load of 2 kN for taper assemblies made from two zirconium alloys and employing three different neck lengths. Five measurements were made for each combination of material and neck length. The results presented in the following table are consistent with the cell means and standard deviations presented in the article.

 

Taper Material

Neck Length

Coefficient of Friction

CPTi-ZrO2

Short

0.254  0.195  0.281  0.289 0.220

CPTi-ZrO2

Medium

0.196  0.220  0.185  0.259 0.197

CPTi-ZrO2

Long

0.329  0.481  0.320  0.296 0.178

TiAlloy-ZrO2

Short

0.150  0.118  0.158  0.175 0.131

TiAlloy-ZrO2

Medium

0.180  0.184  0.154  0.156 0.177

TiAlloy-ZrO2

Long

0.178  0.198  0.201  0.199 0.210

 

a.    Construct an ANOVA table. You may give ranges for the P-values.

b.    Is the additive model plausible? Provide the value of the test statistic, its null distribution, and the P-value.

c.    Can the effect of material on the coefficient of friction be described by interpreting the main effects of material? If so, interpret the main effects. If not, explain why not.

 

 

Answers

Maurice Tutor
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Status NEW Posted 30 Nov 2017 10:11 PM My Price 6.00

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