16. Runners and Cyclists An experiment was conducted involving 10 healthy runners and 10 healthy cyclists to determine whether there are significant differences in pressure measurements within the anterior muscle compartment.8 The data summary—compartment pressure in millimeters of mercury (Hg)—is as follows:

a. Test for a significant difference in the average compartment pressure between runners and cyclists when resting. Use a 5.05.

b. Construct a 95% confidence interval estimate of the difference in means for runners and cyclists when exercising at 80% of maximal oxygen consumption.

c. To test for a significant difference in the average compartment pressures at maximal oxygen consumption, should you use the pooled or unpooled t-test? Explain.

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Runners Standard Cyclists Standard Mean Deviation Mean Deviation Condition Rest 14.5 3.92 11.1 3.98 80% maximal O consumption 12.2 3.49 11.5 4.95 Maximal O 19.1 16.90 12.2 4.47 consumption