[mabbo]

If you're looking for the rate at which something happens, for the purpose of predicting events in the future, you need to see the event occur many times before you can fairly estimate it's rate. That's what my example means.

I'm not defending Uber here- I'm defending statistics!

With more data, we may discover that Uber cars are 100X worse, not just 25X. Or we may discover they're better. But we don't have the statistical power to make that estimate when we've only seen the event happen once.

[sulam]

Your knowledge of statistics could use some enhancement. The response referring to poisson processes is a better view of things.

[mabbo]

> Your knowledge of statistics could use some enhancement.

In this we agree.

[slavik81]

With 0 accidents you cannot accurately measure the rate, but you can estimate an upper bound on it for whatever probability of being wrong you're willing to accept.