How are these numbers calculated?

Big Games

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

Week of 11/4100.0*Chance wins title100.0*Top Half100.0*Average seed
Dartmouth 10 Cornell 0 -12.9
-15.7
-0.8
Penn 38 Princeton 35 +1.1
+3.5
+0.1
Columbia 14 Harvard 21 +0.9
-2.1
Brown 10 Dartmouth 33 -0.2
-1.4
-0.1
Week of 11/11100.0*Chance wins title100.0*Top Half100.0*Average seed
Cornell 8 Columbia 18 -7.0
-31.6
-1.3
Harvard 6 Penn 23 +0.8
+2.5
Princeton 31 Yale 35 No
+2.5
+0.2
If winner is:HomeAway
Week of 11/18100.0*Chance wins title100.0*Top Half100.0*Average seed
Penn vs CornellNo+60.6
-0.7+1.4
Yale vs Harvard+2.7-11.0
+0.1-0.4
Dartmouth vs Princeton-0.5+0.5
+0.1-0.1
Columbia vs Brown-0.1+0.7
-0.0+0.2

What If

Chances based on how well the Cornell finish out the regular season.   Explain

100100100100100100100100
If finish:ChanceTopChance will finish season at seedLast
TPW-Lwins titleHalf12345678PlaceCount
81-0No92.1%226658No1,915,236,996
60-1NoNo334819No3,677,909,436
Total:No31.6%1922253212No5,593,146,432
Games Above .500
Chance Will Win Championship