21 Sep 2010
This is my first post and I am very excited to have an account with Football Outsiders. Recently, I read "Dominance: The Best Seasons of Pro Football's Greatest Teams" by Eddie Epstein and found the book to be fascinating. Epstein's use of the standard deviation for the four statistical categories: Pts. scored, Pts. allowed, Yds. gained and Yds. allowed, was an excellent measuring stick to rank the greatest teams of the past.
However, Eddie also adjusted each teams' ranking by the difficulty of their schedule. He based his adjustment on the difference between a team's opponents' winning percentage and .500. For example, the 1958 Colts have a rating of 6.00. Its opponents had a winning percentage of .504. After adjusting for its schedule, Epstein gives the Colts a rating of 6.02.
For the past few days, I have been trying to figure out how Eddie arrived at the Colts' figure of 6.02 after adjusting their ranking for playing a schedule with a winning percentange of .504. If anyone knows how Epstein arrived at the figure of 6.02 for the 1958 Baltimaore Colts and would like to give me his schedule adjusting formula, I would be most appreciative.
Thank you very much,