How are these numbers calculated?

Big Games

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

Week of 11/5100.0*Chance wins title100.0*Average seed
Hawks 1 Otaki 2 +2.1
+0.2
Masters 5 Otaki 7 +2.1
+0.2
Manakau 1 Jets 5 No
+0.1
Paekakariki 1 Jets 2 No
+0.1
Jets 1 Hawks 9 +1.8
Otaki 3 Paekakariki 3 -1.1
-0.1
Paekakariki 3 Masters 2 -0.2
-0.1
Manakau 3 Babas 0 -0.1
Choppers 0 Manakau 8 -0.1
Points
Chance Will Win Championship