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
Dartmouth 10 Cornell 0 +2.3
+22.4
No
+0.7
Columbia 14 Harvard 21 +2.2
-1.0
+0.1
Brown 10 Dartmouth 33 +1.4
+6.9
+0.3
Penn 38 Princeton 35 +0.1
+5.9
+0.1
Week of 11/11100.0*Chance wins title100.0*Top Half100.0*Last Place100.0*Average seed
Princeton 31 Yale 35 -8.1
+8.0
Cornell 8 Columbia 18 -1.6
+2.1
-0.1
Harvard 6 Penn 23 +1.3
+2.1
+0.1
If winner is:HomeAway
Week of 11/18100.0*Chance wins title100.0*Top Half100.0*Last Place100.0*Average seed
Yale vs HarvardNo+13.9
Yes-13.3
Dartmouth vs Princeton+3.5No
Yes-3.1
+0.6-0.6
Columbia vs Brown-0.2+1.4
-0.1+0.7
-0.1+0.4

What If

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

100100100100100100100100
If finish:ChanceTopChance will finish season at seedLast
TPW-Lwins titleHalf12345678PlaceCount
101-06.9%Yes75241No2,733,244,843
80-1No93.7%445456No2,859,901,589
Total:3.4%96.8%32743233No5,593,146,432
Games Above .500
Chance Will Win Championship