Information about hand posture and forces generated by thefingers during manipulation of
Chapter 9, Problem 77(choose chapter or problem)
Information about hand posture and forces generated by thefingers during manipulation of various daily objects isneeded for designing high-tech hand prosthetic devices. Thearticle Grip Posture and Forces During HoldingCylindrical Objects with Circular Grips (Ergonomics,1996: 1163 1176) reported that for a sample of 11 females,the sample mean four-finger pinch strength (N) was 98.1and the sample standard deviation was 14.2. For a sample of15 males, the sample mean and sample standard deviationwere 129.2 and 39.1, respectively.a. A test carried out to see whether true average strengthsfor the two genders were different resulted inand . Does the appropriate test proceduredescribed in this chapter yield this value of t and thestated P-value?b. Is there substantial evidence for concluding that trueaverage strength for males exceeds that for females bymore than 25 N? State and test the relevant hypotheses.
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