How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 5/11100.0*Chance wins title100.0*Average seed
Inter Milan 2 AC Siena 2 -9.9
-0.1
AS Roma 2 Atalanta BC 1 -1.5
-0.0
Fiorentina 3 Parma 1 +0.2
Juventus 1 Calcio Catania 1 +0.1
Reggina Calcio 2 Empoli 0 +0.1
Week of 5/17100.0*Chance wins title100.0*Average seed
Parma 0 Inter Milan 2 Yes
+0.2
Calcio Catania 1 AS Roma 1 +22.8
+0.2
Empoli 2 Livorno 1 *-0.1

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

Points
Chance Will Win Championship