Refer to Exercise 10.27. Susan Beckham and colleagues conducted an experiment involving 10 healthy runners and 10 healthy cyclists to determine if there are significant differences in pressure measurements within the anterior muscle compartment for runners and cyclists. The data-compartment pressure, in millimeters of mercury (Hg)-are reproduced here:

For each of the three variables measured in this experiment, test to see whether there is a significant difference in the variances for runners versus cyclists. Find the approximate p-values for each of these tests. Will a two-sample t-test with a pooled estimate of σ2 be appropriate for all three of these variables? Explain.

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Runners Cyclists Standard Standard Condition Rest 80% maximal Mean Deviation Mean Deviation 14.5 3.92 12.2 3.49 115 4.95 3.98 02 consumption Maximal 02 consumption 9.1 16.9 2 4.47