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 17 Jan 2018 My Price 7.00

Bone Density and Insertion Torque

The article “Bone Density and Insertion Torque as Predictors of Anterior Cruciate Ligament Graft Fixation Strength” (The Amer. J. of Sports Med., 2004: 1421–1429) gave the accompanying data on maximum insertion torque (n. m) and yield load (N), the latter being one measure of graft strength, for 15 different specimens.

a. Is it plausible that yield load is normally distributed?

b. Estimate true average yield load by calculating a confidence interval with a confidence level of 95%, and interpret the interval

c. Here is output from Minitab for the regression of yield load on torque. Does the simple linear regression model specify a useful relationship between the variables?

d. The authors of the cited paper state, “Consequently, we cannot but conclude that simple regression analysisbased methods are not clinically sufficient to predict individual fixation strength.” Do you agree?

 

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Maurice Tutor
(5)
Status NEW Posted 17 Jan 2018 05:01 PM My Price 7.00

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