> The US drives about 3.2 trillion miles per year. Waymo has 56.7 million miles over several years. Their percentage data is essentially useless.
No, that's not how statistics works.
The percentage data's accuracy depends mainly on the number of incidents recorded (and somewhat on the rate of incidents). But the percentage of the whole is completely irrelevant.
If you are basing something on 10 incidents but it's 50% of the total, it's still terrible accuracy.
Whereas if you are basing something on 100,000 incidents but it's only 0.1% of the total, it's still going to be quite accurate, assuming the incidents come from the same overall distribution.
No, that's not how statistics works.
The percentage data's accuracy depends mainly on the number of incidents recorded (and somewhat on the rate of incidents). But the percentage of the whole is completely irrelevant.
If you are basing something on 10 incidents but it's 50% of the total, it's still terrible accuracy.
Whereas if you are basing something on 100,000 incidents but it's only 0.1% of the total, it's still going to be quite accurate, assuming the incidents come from the same overall distribution.