I’ll take one more crack at it. Assume, for the sake of making my point that 20% of boaters have training and 80% of boaters do not. If only 20% of fatalities are caused by those with training, it’s doesn’t prove the training had any impact on the fatality rate. You’d have to show that significantly fewer than 20% of fatalities involved boaters with training to be able to say it had a statistical impact.I apologize, my friend, I really have no idea what you just said. Or, of the point that you're trying to make.
One more way to say it. 83% of the population has brown eyes. If 83% of the accidents involve people with brown eyes, it does not mean that people with blue and green eyes are safer.
Let’s put this to use now. Those four states, according to the link below have 32.2% of all the registered boats in the country. There is no correlation to their reported lax training rules. It’s only cause that’s where the 30% of boats are.What I do know, is that the States with the highest numbers of registered boaters and the highest number of Fatalities, have had, for a long time, the least restrictive rules regarding training. ( in some cases no rules) That is changing.
New York, California, Texas, Florida have all recently passed boating safety laws. These are being phased in, so it will take years to see if there is any impact. Those 4 states account for over 30% of the fatalities.
In fact, if you were correct, you’d want to see that only 10% of the registered boats were in these states, when they disproportionately had 30% of fatalities. But they don’t.