Alex Horvath ) writes:
One often hears statistics such as deaths from scuba diving being
approximately equal to mowing lawns. Are these statistics based on the
population that regularly engages in these activities or the total
population?

Obviously if one does not scuba dive their risk of dying from this
activity is zero. So using the total population to calculate the death
rate for activities practiced by a very small proportion of the
population would depress those rates tremendously.

It might explain why my former neighbour never mowed his lawn.

On the alien UFO cause, since in the USA all non-citizens are officially
"aliens" and non-citizens do paddle there, there must be some non-negative
probability of a kayker in the USA being killed by one. How much white
does there have to be in white water before a kayak is considered airborne?

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