How are these numbers calculated?

Big Games

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

Week of 5/24100.0*Average seed
Atalanta BC 2 Palermo 2 -0.2
Calcio Catania 3 Napoli 1 +0.2
Sampdoria 2 Udinese 2 +0.1
AC Siena 0 Juventus 3 +0.1
Week of 5/31100.0*Average seed
Palermo 2 Sampdoria 2 +0.2
Inter Milan 4 Atalanta BC 3 -0.1
Points
Chance Will Win Championship