It would help if we had more information but in general if its an MTT, good players are ITM (in the money) between 10 and 40 percent of the time. A good ROI is between 50% and 700% . An ok player might be around 50-100% and a very good player might be around 200 to 300% an expert might be over 400%.
But this is over the long term, and the long term is a very long time much longer than most people think.
Also as a general rule the larger the field of a tournament the greater the ROI potential for the skilled player.