How are these numbers calculated?

Big Games

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

Week of 8/6100.0*Chance in playoffs100.0*Average seed
Bradford 3 OSU 1 -5.1
-0.4
Orillia 2 OSS 2 +1.6
+0.1
Alliston 1 EG Rangers 4 -0.4
+0.0
Week of 8/13100.0*Chance in playoffs100.0*Average seed
Alliston 2 OSU 1 -4.8
-0.5
Collingwood 5 Bradford 0 +2.3
+0.0
Orillia 2 EG Rangers 3 +1.1
-0.1
EG Rangers 5 OSS 1 -0.6
-0.1
Orillia 3 Alliston 3 +0.5
+0.1
OSU 2 Orillia 2 -0.1
-0.1
Week of 8/20100.0*Chance in playoffs100.0*Average seed
OSU 1 Bradford 0 In
+0.4
EG Rangers 1 Alliston 4 -0.4
Bradford 2 EG Rangers 4 -0.3
Points
Chance Will Make Playoffs