Let's make up some numbers (and take TW's name off the numbers as they are bogus, and may not even be realistic).
Let's assume that our player is aiming to drive 310 yards. Lets also assume his actual drive can be approximated using the normal distribution. Lets also say his mean drive is 305 yards with a standard deviation of 15 yards.
We now have some assumptions, I'll give you a chance to make some calculations with them. Let me know if you want me to do more explaining, if not you can explain the rest to me
