I found a question on StackOverflow that I thought might be more of a statistics question, so I thought I would head over to stats.SE to check out the FAQ to see what's on-topic.
There's no obvious link to a FAQ, but there is a link to a "tour", and that has a link to the FAQ. Unfortunately, the FAQ page just redirects you to the tour.
While I would hope that the FAQ (or criteria for "on-topic" questions) would be readily available from the help page of the site, at the very least the link for it on the tour should be fixed.