Green Bay Packers Playoff Chances 2013 50/50

Beat Chicago 33-28, playoff odds up 50 to 100%
8-7-1   .531

How are these numbers calculated?

Big Games

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

Week of 12/12100.0*Chance in playoffs100.0*Average seed
Dallas 36 Green Bay 37 +11.0
+1.2
Detroit 16 Baltimore 18 +6.3
+0.4
Cleveland 31 Chicago 38 -5.1
-0.3
Tampa Bay 14 San Francisco 33 -0.1
St. Louis 27 New Orleans 16 -0.1
NY Giants 0 Seattle 23 +0.1
Minnesota 48 Philadelphia 30 +0.1
Tennessee 34 Arizona 37 -0.0
Week of 12/22100.0*Chance in playoffs100.0*Average seed
Philadelphia 54 Chicago 11 +25.0
+1.0
Green Bay 31 Pittsburgh 38 -12.5
-1.1
Detroit 20 NY Giants 23 +3.2
+0.3
Washington 23 Dallas 24 -0.1
St. Louis 23 Tampa Bay 13 -0.1
Week of 12/29100.0*Chance in playoffs100.0*Average seed
Chicago 28 Green Bay 33 In
+2.8
Minnesota 14 Detroit 13 +0.3
Seattle 27 St. Louis 9 +0.2
Games Above .500
Chance Will Make Playoffs