You have a young baby who is very sick. Would you rather take the baby to a doctor who has never had a patient die or one who has young patients die on a regular basis? Based on this one statistic the answer might seem to be very simple since the first doctor would SEEM to be much better.
When you look further into the above example you might make a very different decision. The first doctor might never have lost a patient because he has never treated a patient with anything worse than a cold. The second doctor might lose patients regularly because he is the best at what he does and because of that he treats all of the babies who have no hope. This second doctor might be their only chance so people are going to him even though there might only be a 10% chance of success.
This is a harsh but realistic example of where statistics might not be an accurate barometer of a persons abilities and competencies.
Just something to think about.
Have a great day!