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
Columbia 14 Harvard 21 +6.3
+22.3
No
+0.9
Brown 10 Dartmouth 33 -1.8
-4.0
-0.2
Dartmouth 10 Cornell 0 +1.2
-1.4
+0.1
Penn 38 Princeton 35 +0.7
+1.9
+0.1
Week of 11/11100.0*Chance wins title100.0*Top Half100.0*Last Place100.0*Average seed
Harvard 6 Penn 23 -11.2
-26.5
-1.1
Princeton 31 Yale 35 No
-0.6
+0.1
Cornell 8 Columbia 18 -1.2
If winner is:HomeAway
Week of 11/18100.0*Chance wins title100.0*Top Half100.0*Last Place100.0*Average seed
Yale vs HarvardNo+32.3
-0.9+0.9
Dartmouth vs Princeton-3.1+3.1
Columbia vs Brown-3.1+3.1
-0.1+0.1

What If

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

100100100100100100100100
If finish:ChanceTopChance will finish season at seedLast
TPW-Lwins titleHalf12345678PlaceCount
81-0No64.6%6233535No882,423,962
60-1NoNo424217No882,476,582
Total:No32.3%3111839218No1,764,900,544
Games Above .500
Chance Will Win Championship