The sample size is in the article:
> Nearly 13,500 drivers were randomly sent one of two policy review forms to sign…
The distribution referenced is of mileage, which you’d expect to have some kind of right-skewed, continuous distribution.
> Nearly 13,500 drivers were randomly sent one of two policy review forms to sign…
The distribution referenced is of mileage, which you’d expect to have some kind of right-skewed, continuous distribution.