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:
... 23.4% are non-families. 20.3% of all households are made up of individuals and 5.7% have someone living alone who is 65 years of age or older. The average household size ...