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*Conference Nat’l100.0*Average seed
Northampton 0 York 2 +1.5
-0.2
Wycombe 2 Aldershot Town 1 -0.4
+0.1
Burton Albion 1 Plymouth Argyle 0 -0.2
+0.1
AFC Wimbledon 2 Exeter City 2 -0.2
+0.1
Dag & Red 0 Oxford United 1 -0.1
+0.2
Week of 4/20100.0*Conference Nat’l100.0*Average seed
Bristol Rovers 0 Accrington 1 -2.2
+1.5
York 2 Southend 1 +1.5
-0.2
Barnet 1 Wycombe 0 +1.3
-0.1
Morecambe 0 Torquay United 2 +1.0
-0.3
Aldershot Town 1 Dag & Red 0 +0.3
+0.2
Gillingham 2 AFC Wimbledon 2 +0.3
-0.0
Plymouth Argyle 0 Rotherham 1 +0.2
Week of 4/27100.0*Conference Nat’l100.0*Average seed
Accrington 0 Oxford United 3 -1.3
Southend 0 Morecambe 1 -0.4
Torquay United 3 Bristol Rovers 3 +0.3
Dag & Red 0 York 1 -0.3
Rochdale 1 Plymouth Argyle 0 +0.1
Northampton 2 Barnet 0 +0.1
Points
Chance Will Win Championship