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
Brown 10 Dartmouth 33 -0.3
-2.5
No
-0.1
Penn 38 Princeton 35 +0.2
+10.8
-7.8
+0.7
Columbia 14 Harvard 21 +0.1
-0.6
+0.1
-0.1
Dartmouth 10 Cornell 0 +0.1
-0.5
+0.4
-0.1
Week of 11/11100.0*Chance wins title100.0*Top Half100.0*Last Place100.0*Average seed
Princeton 31 Yale 35 No
+1.5
+0.1
Harvard 6 Penn 23 +0.4
+19.6
+0.8
Cornell 8 Columbia 18 -0.1
+0.3
If winner is:HomeAway
Week of 11/18100.0*Chance wins title100.0*Top Half100.0*Last Place100.0*Average seed
Penn vs Cornell+41.1No
+1.1-1.1
Yale vs Harvard+8.9-8.9
+0.2-0.2
Columbia vs Brown-1.6+1.6
-0.1+0.1
Dartmouth vs Princeton-1.6+1.6

What If

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

100100100100100100100100
If finish:ChanceTopChance will finish season at seedLast
TPW-Lwins titleHalf12345678PlaceCount
81-0No82.3%7284718No882,455,023
60-1NoNo215821No882,445,521
Total:No41.1%41423192910No1,764,900,544
Games Above .500
Chance Will Win Championship