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
Columbia 14 Harvard 21 +11.7
-0.6
+0.2
Dartmouth 10 Cornell 0 +6.1
-0.4
+0.1
Penn 38 Princeton 35 +4.1
+0.7
+0.1
Brown 10 Dartmouth 33 -0.8
-0.2
-0.0
Week of 11/11100.0*Chance wins title100.0*Top Half100.0*Average seed
Princeton 31 Yale 35 +27.8
Yes
+0.5
Cornell 8 Columbia 18 -4.6
+0.3
-0.1
Harvard 6 Penn 23 +1.4
-0.1
If winner is:HomeAway
Week of 11/18100.0*Chance wins title100.0*Top Half100.0*Average seed
Yale vs HarvardYes-43.6
+0.1-0.6
Columbia vs Brown-0.8+5.8
-0.0+0.1
Dartmouth vs Princeton-2.1+2.0
-0.1+0.0

What If

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

100100100100100100100100
If finish:ChanceTopChance will finish season at seedLast
TPW-Lwins titleHalf12345678PlaceCount
121-0YesYes100No4,495,854,861
100-145.8%Yes464014No1,097,291,571
Total:89.4%Yes8983No5,593,146,432
Games Above .500
Chance Will Win Championship