  We examine Joe DiMaggio's 56-game hitting streak and look at its likelihood,
using a number of simple models. And it turns out that, contrary to many
people's expectations, an extreme streak, while unlikely in any given year, is
not unlikely to have occurred about once within the history of baseball.
Surprisingly, however, such a record should have occurred far earlier in
baseball history: back in the late 1800's or early 1900's. But not in 1941,
when it actually happened.
