Are these results from a population or a sample? What proportion of concussions came from horse back riding? What proportion of concussion came from riding bicycles? Can we conclude that, at least in terms of concussions, riding bicycles is more dangerous to children in the auS than horseback riding?

Researchers examined all sports-related concussions reported to an emergency room from children ages 5 to 18 in the United States over the course of one year. The table below displays the number of concussions in each of the major activity categories. Activity Frequency Bicycles 23,405 Football 20,293 Basketball 11,507 Playground 10,414 Soccer 7667 Baseball 7433 All-Terrain Vehicle 5220 Hockey 4111 Skateboarding 4408 Swimming 3846 Horseback Riding 2648 Total 100.952