A. Death rates from the both sport types' statistics would definitely help us to understand which type of sport is more dangerous.
Let's say there are
1) 1000 people who skydived from skyscrapers last year, and there is 1 fatality.
2) 5000000 people who did horseback riding last year, and there are 500 deaths.
Death rate in the first case is 0.001, and in the second case - 0.0001. This means that horseback riding is safer than skydiving from skyscrapers demonstrating the absurdity of the inference.
...
Let's say there are
1) 1000 people who skydived from skyscrapers last year, and there is 1 fatality.
2) 5000000 people who did horseback riding last year, and there are 500 deaths.
Death rate in the first case is 0.001, and in the second case - 0.0001. This means that horseback riding is safer than skydiving from skyscrapers demonstrating the absurdity of the inference.
...




