Chapter 25 Data Sets Brain waves Braking Braking test 2 Cloud seeding Couples ages Freshman 15 Friday the 13th, accidents Friday the 13th, traffic Gasoline Job satisfaction NY Marathon 2008 Online insurance I Push-ups Sex sells Strikes Summer school Temperatures Tuition 2006 Wheelchair marathon Wheelchair marathon 2009 Wind speed Women's skating 1500 Yogurt Flexible schedule