Large Sample: Testing for Randomness of Marathon Runners Refer to Data Set 8 in Appendix B for the random sample of runners who finished the New York City marathon.

The runners are listed in the order in which they finished. Test for randomness of ages above and below the mean age. Is there sufficient evidence to support the claim of a reporter who writes that the younger runners tend to finish before the older runners?

12-7 Beyond the Basics