Quote:
Originally posted by Le Grande Orange
It's a measure of how many more wins, on a percentage basis, a team is getting at home than it would be expected to have based on its overall winning percentage.
Consider a team which finishes 98-56 .636 overall. At home it goes 52-25 .675 and 46-31 .597 on the road. If you take the overall winning percentage and applied it to just the home games, that would yield 49 wins (.636 x 77). The team actually won 52 games at home, however. So, 52 / 49 = 1.0612, which is 6.12%. Therefore, the team won 6.12% more games at home than its overall winning percentage suggested it would.
Hope that makes it a bit clearer. 
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Yes, much clearer, thank you.
So column E = C - D and F = C / B.
Looking at column F, it looks like the better teams have less variance than worse teams. Any idea why? Better teams are always playing hard to hopefully win their division and worse teams play harder in front of their fans than on the road?