Acrylic bone cement is commonly used in total joint arthroplastyas a grout that allows

Chapter 9, Problem 82

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Acrylic bone cement is commonly used in total joint arthroplastyas a grout that allows for the smooth transfer of loadsfrom a metal prosthesis to bone structure. The paperValidation of the Small-Punch Test as a Technique forCharacterizing the Mechanical Properties of Acrylic BoneCement (J. of Engr. in Med., 2006: 1121) gave the followingdata on breaking force (N): Temp Medium n s22 Dry 6 170.60 39.0837 Dry 6 325.73 34.9722 Wet 6 366.36 34.8237 Wet 6 306.09 41.97Assume that all population distributions are normal.a. Estimate true average breaking force in a dry medium at37 in a way that conveys information about reliabilityand precision, and interpret your estimate.b. Estimate the difference between true average breakingforce in a dry medium at 37 and true average force at thesame temperature in a wet medium, and do so in a waythat conveys information about precision and reliability.Then interpret your estimate.c. Is there strong evidence for concluding that true averageforce in a dry medium at the higher temperature exceedsthat at the lower temperature by more than 100 N?