Well, to say the truth, the tool-tip isn't very accurate :p
Granted!
Addition:
Quote
Let say you're aim is the best in the world, If your target is invisible or beyond out of range then you have a 0% chance to hit it which means you will never be able to hit your target no matter how good your accuracy is....ever.
The chance to hit is what matters when dealing with what I'm talking about. When you have a dex of 11 then you should not have a 49% chance to hit while the enemy is right next to you, and when you shoot, you still miss.
This is a good example. But lets flip it around. Lets say the target is visible and right in front of you, but you're a highly inaccurate shot. Your overall chance to hit is reduced by your poor personally accuracy.