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:
... The median age is 34 years. For every 100 females there are 91.0 males. For every 100 females age 18 and over, there are 82.9 males.
The median income for a household in ...