In what system? I'm familiar with Saga Edition and the older d20 Star Wars, and I've never heard of a rule like that.
Saga gives everyone the relevant ability score + 1/2 character level + 5 if they're trained + 5 if they have skill focus, and sometimes a small equipment bonus. There isn't any inherent bonus for being Jedi or otherwise using the Force, unless it comes from a Force Power.
The older d20 Star Wars editions were even worse because they made most Force powers into skills, meaning that Jedi were on average worse at most non-Force skills because their ranks were spread thinner.