Tuesday, February 8, 2011

The batting average example to demonstrate context.

http://www.baseball-reference.com/leaders/batting_avg_leagues.shtml

In 1930 Bill Terry batted .401.  In 1968 Carl Yastrzemski batted .301. Both led their leagues.  Who did better?

abbreviations:

NL- National League
AL - American League
BA - Batting Average

In 1930 NL BA was .303.  In 1968 AL BA was .230.

Terry: (.401 - .303) / .303 = 0.323432343 - 32% above NL BA

Yastrzemski: (.301 - .230) / .230 = 0.308695652 - 31% above AL BA

Terry but not by nearly as much as you might expect.

For my friend Steve.

1 comment:

Anonymous said...

Your friend Steve appreciates the clarity of the example and the definitions of the abbreviations used. As a non-baseball fanatic, I enjoy the discussions but need help on some of the finer details.

Keep up the posts. They are truly interesting.