>>22253842Yes they do. There's a lower limit number for stats that you'd get with a base stat of 1. I'm not sure what it is, but +1 base stat = +2 stat number, or +3 if it starts a new multiple of 10.
Natures increase a stat by 10%. Once you know how it works, you can calculate what stat number a base stat translates to, how much it'd increase with investment, ect.