How are these numbers calculated?

Big Games

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

Week of 11/11100.0*Average seed
Sarpsborg 1 Sandefjord 1 -0.3
Odd 0 Stabæk 3 +0.3
Bodø/Glimt 1 Vålerenga 1 +0.1
Week of 11/25100.0*Average seed
Tromsø 0 Sarpsborg 2 +1.0
Vålerenga 2 Ranheim 1 -0.4
Brann 1 Odd 0 +0.1
Points
Chance Will Win Championship