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 +17.5
+0.6
South Africa 46 Samoa 6 -1.0
Week of 10/2100.0*Chance in playoffs100.0*Average seed
South Africa 34 Scotland 16 -17.4
-0.5
Samoa 5 Japan 26 +7.1
+0.1
South Africa 64 United States 0 -0.3
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
120-000In100901,705,920
Total:In100901,705,920
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 -2.6
France 41 Canada 18 +0.2
Wales 23 Fiji 13 +0.2
Ireland 44 Romania 10 +0.1
Argentina 54 Georgia 9 -0.1
Australia 65 Uruguay 3 +0.1
Week of 10/2100.0*Lottery seed
South Africa 34 Scotland 16 +2.0
South Africa 64 United States 0 +0.3
New Zealand 43 Georgia 10 +0.1
Samoa 5 Japan 26 -0.1
England 13 Australia 33 +0.0
Week of 10/9100.0*Lottery seed
Samoa 33 Scotland 36 -1.5
England 60 Uruguay 3 +0.2
Australia 15 Wales 6 -0.1
New Zealand 47 Tonga 9 -0.1
If winner is:HomeTieAway
Argentina vs Namibia+0.6-0.4-0.4
France vs Ireland-0.0+0.5-0.1

What If

100100100100100100100100100100100100100100100100100100100100
If finish:Chance will finish season at seed
TPW-OTLT1234567891011121314151617181920
120-000265123
Total:265123