How are these numbers calculated?

Big Games

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

Week of 6/5100.0*Chance in playoffs100.0*Average seed
Argentina 44 Scotland 13 -19.5
-1.8
Wales 26 Scotland 21 -2.0
France 45 USA 3 -1.5
New Zealand 14 Australia 10 +0.9
+0.0
South Africa 31 England 24 +0.3
Argentina 28 Samoa 16 +0.2
+0.0
Ireland 46 Fiji 3 +0.2
+0.0
Wales 42 Samoa 3 -0.1
South Africa 97 USA 0 -0.1
Ireland 19 Australia 15 -0.1
New Zealand 59 Fiji 6 -0.1
If winner is:HomeDrawAway
Week of 6/13100.0*Chance in playoffs100.0*Average seed
Scotland vs Samoa-26.2OutIn
-1.4-2.8+1.6
Australia vs Fiji-21.7+20.7+20.7
France vs South Africa-20.1-20.1+3.3
-0.4-0.4+0.1
England vs USA-0.2-0.2+1.7
+0.1-0.4-0.4

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs123456789101112Count
41-0-044.3%444964,709,513,601
20-1-0Out100221,577,371
00-0-1In425174,709,773,268
Total:70.5%21253222459,640,864,240
Games Above .500
Chance Will Make Playoffs