A seemingly intrinsic part of the game of baseball is the keeping of statistics on the achievements of the players. Started by Henry Chadwick in the 19th century who devised the concept of batting average based on his experience of cricket. Commonly used statistics are explained here:
... families residing in the town. The population density is 943.4/km² (2,444.3/mi²). There are 5,418 housing units at an average density of 300.6/km² ...