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*Last Place100.0*Average seed
Penn 38 Princeton 35 -8.3
-30.3
+0.1
-1.3
Columbia 14 Harvard 21 +3.5
-1.1
Dartmouth 10 Cornell 0 +2.0
-3.4
Brown 10 Dartmouth 33 -1.5
No
-0.0
Week of 11/11100.0*Chance wins title100.0*Top Half100.0*Last Place100.0*Average seed
Harvard 6 Penn 23 +0.2
+1.1
Cornell 8 Columbia 18 -0.1
+0.3
+0.1
Princeton 31 Yale 35 No
No
-0.8
If winner is:HomeAway
Week of 11/18100.0*Chance wins title100.0*Top Half100.0*Last Place100.0*Average seed
Dartmouth vs Princeton-0.5+0.4
Yale vs Harvard+0.1-0.2

What If

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

100100100100100100100100
If finish:ChanceTopChance will finish season at seedLast
TPW-Lwins titleHalf12345678PlaceCount
61-0NoNo273737No2,859,901,589
40-1NoNo100No2,733,244,843
Total:NoNo141968No5,593,146,432
Games Above .500
Chance Will Win Championship