A little rough statistical analysis I did earlier...
How many pit bulls are there in the United States? estimated 500,000.
In 20 years (longer than the average lifespan of a pit bull), there were 238 fatal dog bite injuries. Assuming to 50% attributable to Rotts and Pits was split 50/50, that is 47 fatal dog bites. Round to 50 for math.
We will assume that one dog killed one person, for simplicity. We will also assume all these fatal attacks were the dog's fault (NOT a safe assumption).
The chance of a given pit bull fatally attacking a person over the dog's lifetime is 0.01%, a statistically insiginificant number.
