Question

3. After running about 17 miles, marathon runners encounter a form of physiological stress which they call “hitting the wall.” To better pinpoint where in a race to expect this phenomenon, a sports physiologist has 12 male marathon runners race until each feels this stress. The variable of interest is the number of miles run until the stress occurs. These are
15.8 16.5 15.3 16.2 17.1 16.4
17.5 17.3 16.9 16.6 17.0 17.7
Construct the 95% confidence interval from the data.

Answer 1

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