How are these numbers calculated?

Big Games

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

Week of 9/25100.0*Chance in playoffs100.0*Average seed
Scotland 39 United States 16 +5.8
+0.2
South Africa 46 Samoa 6 -2.1
+0.1
Week of 10/2100.0*Chance in playoffs100.0*Average seed
South Africa 34 Scotland 16 -9.5
-0.8
Samoa 5 Japan 26 +0.8
South Africa 64 United States 0 -0.2
Week of 10/9100.0*Chance in playoffs100.0*Average seed
Samoa 33 Scotland 36 In
+0.2

What If

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

100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-OTLTplayoffs12345Count
120-000In1002,833,757,760
Total:In1002,833,757,760
Points
Chance Will Make Playoffs

Lottery

Why are you looking down here? We just made the playoffs!

Big Games

Week of 9/25100.0*Lottery seed
Scotland 39 United States 16 -0.9
Argentina 54 Georgia 9 -0.2
South Africa 46 Samoa 6 -0.1
Ireland 44 Romania 10 +0.1
Australia 65 Uruguay 3 +0.0
France 41 Canada 18 +0.0
Wales 23 Fiji 13 +0.0
Week of 10/2100.0*Lottery seed
South Africa 34 Scotland 16 +2.9
South Africa 64 United States 0 +0.2
New Zealand 43 Georgia 10 +0.1
Week of 10/9100.0*Lottery seed
Samoa 33 Scotland 36 -0.8
Australia 15 Wales 6 -0.1
England 60 Uruguay 3 +0.0
If winner is:HomeTieAway
Argentina vs Namibia+0.2-0.8-0.8
France vs Ireland-0.0+0.2-0.1

What If

100100100100100100100100100100100100100100100100100100100100
If finish:Chance will finish season at seed
TPW-OTLT1234567891011121314151617181920
120-00043362
Total:43362