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
Jets 1 Hawks 9 +8.0
+0.1
Paekakariki 1 Jets 2 No
-0.1
Manakau 1 Jets 5 -1.8
+0.0
Otaki 3 Paekakariki 3 -1.6
-0.1
Paekakariki 3 Masters 2 +0.7
+0.1
Hawks 1 Otaki 2 -0.1
Masters 5 Otaki 7 -0.0
Manakau 3 Babas 0 -0.0
Choppers 0 Manakau 8 -0.0
Points
Chance Will Win Championship