How are these numbers calculated?

Big Games

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

Week of 4/24100.0*Promoted100.0*Average seed
Northampton 2 Shrewsbury 0 +2.7
+1.0
Cheltenham 1 Aldershot 2 -0.7
-0.1
Lincoln City 1 Bury 0 +0.6
+0.1
Port Vale 2 Notts County 1 -0.5
-0.2
Chesterfield 1 Bradford 1 +0.4
+0.1
Morecambe 1 Dag & Red 0 +0.2
-0.1
Barnet 0 Rotherham 1 -0.2
Week of 5/8100.0*Promoted100.0*Average seed
Port Vale 1 Shrewsbury 1 +1.1
+0.2
Chesterfield 2 Bournemouth 1 No
-0.3
Darlington 0 Dag & Red 2 No
-0.1
Northampton 1 Bury 1 No
-1.1
Points
Chance Will Win Championship