Runners and Cyclists II Refer to Exercise10.27. In addition to the compartment
Chapter 10, Problem 40(choose chapter or problem)
Runners and Cyclists II Refer to Exercise10.27. In addition to the compartment pressures,the level of creatine phosphokinase (CPK) in bloodsamples, a measure of muscle damage, was determinedfor each of 10 runners and 10 cyclists before and afterexercise.7 The data summaryCPK values inunits/literis as follows:Runners CyclistsStandard StandardCondition Mean Deviation Mean DeviationBefore Exercise 255.63 115.48 173.8 60.69After Exercise 284.75 132.64 177.1 64.53Difference 29.13 21.01 3.3 6.85a. Test for a significant difference in mean CPK valuesfor runners and cyclists before exercise underthe assumption that s21 s22; use a .05. Find a95% confidence interval estimate for the correspondingdifference in means.b. Test for a significant difference in mean CPK valuesfor runners and cyclists after exercise under theassumption that s21 s22; use a .05. Find a 95%confidence interval estimate for the correspondingdifference in means.c. Test for a significant difference in mean CPKvalues for runners before and after exercise.d. Find a 95% confidence interval estimate for thedifference in mean CPK values for cyclists beforeand after exercise. Does your estimate indicatethat there is no significant difference in mean CPKlevels for cyclists before and after exercise?
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