How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 3/1100.0*Chance in playoffs100.0*Average seed
Tampa Bay 25 DC 0 -12.2
-0.3
New York 17 LA 14 -3.0
-0.1
St Louis 23 Seattle 16 -2.3
-0.1
Dallas 20 Houston 27 +0.2
If winner is:HomeTieAway
Week of 3/8100.0*Chance in playoffs100.0*Average seed
DC vs St Louis+15.6*-1.4-15.6
+0.4-0.0-0.4
Dallas vs New York+4.2-3.7-4.2
+0.1-0.1-0.1
LA vs Tampa Bay+3.5+4.0-3.5
+0.1+0.1-0.1
Houston vs Seattle-0.1*+1.1+0.1

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

What If

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

100100100100
If finish:Chance inChance will finish regular season at seed
TWW-L-Tplayoffs1234Count
7.5-8In100154,220*
75-1-0In964900,473
4-0-2In1001
6.54-1-199.6%772303,639
64-2-097.6554222,253,417
3-1-2In33676
5.53-2-181.320621807,079
53-3-056.96513852,999,734
2-2-271.47114147
4.52-3-121.702259197,208
42-4-07.7847452,253,033
1-3-2Out505010
3.51-4-11.2128713,709
31-5-00.101288901,045
0-4-2Out1003
2.50-5-1Out496709
20-6-0Out100153,643
Total:53.4%252825229,637,936

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs