How are these numbers calculated?

Big Games

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

Week of 4/13100.0*Chance wins title100.0*Championship100.0*Average seed
Stevenage 0 Yeovil 2 +3.1
+9.4
+0.8
Crewe 1 Doncaster 2 -1.6
-1.5
-0.1
Oldham 1 Yeovil 0 No
-5.1
-0.5
Brentford 3 Portsmouth 2 -0.7
-1.9
-0.1
Shrewsbury 0 Bournemouth 3 -0.7
-2.7
-0.1
Sheff Utd 2 Swindon 0 -0.2
-0.7
-0.0
Sheff Utd 2 Brentford 2 +0.2
+0.8
Tranmere 0 Hartlepool 1 +0.3
+0.0
Scunthorpe 1 Walsall 1 +0.2
+0.0
Leyton Orient 2 MK Dons 0 +0.1
Swindon 4 Crewe 1 -0.1
Week of 4/20100.0*Chance wins title100.0*Championship100.0*Average seed
Yeovil 1 Crewe 0 +1.8
+0.5
Bournemouth 3 Carlisle 1 -1.0
Hartlepool 1 Brentford 1 +0.6
Portsmouth 3 Sheff Utd 0 +0.2
+0.2
Crewe 1 Sheff Utd 0 +0.2
Swindon 3 Stevenage 0 -0.2
Week of 4/27100.0*Chance wins title100.0*Championship100.0*Average seed
Bury 3 Yeovil 2 -0.7
Scunthorpe 2 Swindon 1 +0.1
Brentford 0 Doncaster 1 +0.1
Sheff Utd 0 Preston 0 +0.1
Points
Chance Will Win Championship