Washington Redskins Playoff Chances 2015 50/50

Beat Dallas 34-23, average seed unchanged at 4
9-7-0   .563

How are these numbers calculated?

Big Games

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

Week of 12/17100.0*Chance in playoffs100.0*Average seed
Washington 35 Buffalo 25 +11.8
+0.9
NY Giants 35 Carolina 38 +6.7
+0.3
Philadelphia 17 Arizona 40 +4.4
+0.2
Minnesota 38 Chicago 17 -1.5
+0.0
Seattle 30 Cleveland 13 -0.9
-0.0
Dallas 16 NY Jets 19 +0.8
+0.1
Jacksonville 17 Atlanta 23 -0.4
-0.1
St. Louis 31 Tampa Bay 23 +0.3
+0.0
Week of 12/24100.0*Chance in playoffs100.0*Average seed
Philadelphia 24 Washington 38 In
+1.6
Week of 1/3None
Games Above .500
Chance Will Make Playoffs