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
Sheff Utd 2 Swindon 0 +7.1
+11.5
+0.8
Sheff Utd 2 Brentford 2 -5.7
-8.7
-0.4
Crewe 1 Doncaster 2 -4.3
-2.6
-0.1
Shrewsbury 0 Bournemouth 3 -2.0
-4.3
-0.2
Brentford 3 Portsmouth 2 -0.9
-1.6
-0.1
Stevenage 0 Yeovil 2 -0.4
-1.4
-0.2
Oldham 1 Yeovil 0 +0.2
+1.0
+0.2
Tranmere 0 Hartlepool 1 +0.3
Scunthorpe 1 Walsall 1 +0.2
Leyton Orient 2 MK Dons 0 +0.2
Week of 4/20100.0*Chance wins title100.0*Championship100.0*Average seed
Doncaster 0 Notts County 1 +2.5
+3.1
+0.1
Portsmouth 3 Sheff Utd 0 No
-7.0
-0.7
Hartlepool 1 Brentford 1 +0.7
+1.2
+0.1
Bournemouth 3 Carlisle 1 -0.4
-2.8
-0.1
Yeovil 1 Crewe 0 -0.1
-0.1
Crewe 1 Sheff Utd 0 -0.6
Swindon 3 Stevenage 0 -0.0
Week of 4/27100.0*Chance wins title100.0*Championship100.0*Average seed
Scunthorpe 2 Swindon 1 +0.5
Bury 3 Yeovil 2 +0.3
Sheff Utd 0 Preston 0 -0.2
Points
Chance Will Win Championship