Looking for advice on how to auto-generate player/npc stats

So this is more of a general programming question rather than Unreal Engine specific, hope that’s ok?
I have a data table of the top 64 FIFA ranked soccer teams and each contain an array of soccer players.
I want to generate the stats of each player based on the ranking of the team they play for. For example, Argentina are first in FIFAs rankings so I need their players to have high values for their attributes and abilities, up to a max of 10 and no lower than say 7. So Messi could have a ball control of 9.7, speed 8.5 etc. Then I will find the mean stat of the whole team and use that as the overall strength of Argentina. I need to do this for all 64 teams but a team can not have a higher strength value than the team above them so this will need to show in their players’ stats.
I would appreciate it if anyone could give me some guidance on this?