San Francisco 49ers Playoff Chances 2012-Final 50/50

Beat Arizona 27-13, average seed up 1.2 to 2
11-4-1   .719

How are these numbers calculated?

Big Games

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

Week of 12/13100.0*Chance in playoffs100.0*Average seed
San Francisco 41 New England 34 In
+0.6
Seattle 50 Buffalo 17 -0.6
-0.2
Green Bay 21 Chicago 13 +0.3
-0.1
Atlanta 34 NY Giants 0 +0.3
-0.0
Washington 38 Cleveland 21 -0.3
Dallas 27 Pittsburgh 24 -0.3
Week of 12/22100.0*Chance in playoffs100.0*Average seed
Seattle 42 San Francisco 13 -0.5
Green Bay 55 Tennessee 7 -0.2
Atlanta 31 Detroit 18 -0.1
Week of 12/30100.0*Chance in playoffs100.0*Average seed
San Francisco 27 Arizona 13 +0.7
Seattle 20 St. Louis 13 -0.5
Minnesota 37 Green Bay 34 +0.2
Games Above .500
Chance Will Make Playoffs