How are these numbers calculated?

Big Games

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

Week of 12/27100.0*Chance in playoffs100.0*Average seed
Riverhead 58 Southampton 62 +8.7
+0.3
Longwood 54 Southampton 66 +7.4
+0.3
Center Moriches 81 Pierson 50 -2.6
-0.1
Mattituck 87 Greenport 45 -2.6
-0.1
Center Moriches 98 BBP 55 -2.2
-0.1
Mattituck 95 Shelter Island 49 -2.2
-0.1
Southold 76 Port Jefferson 55 +2.1
+0.1
Hampton Bays 77 Westhampton 71 -1.1

What If

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

100100100100100100100100100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678910111213141516171819202122232425262728Count
95-0In8218017,392
84-197.0%145231386,679
73-227.11266013172,440
62-30.613564172,271
51-4Out2474286,379
40-5Out2801817,553
Total:27.0%591334381552,714
Games Above .500
Chance Will Make Playoffs