There is some overlap and it's not always easy to draw the line between mathematics and science (particularly theoretical physics), but most of the examples given seem to me to be more on the "using mathematics in other fields" side of the line than the "mathematics" side of the line.
I think that really the important question is whether the people who would be able to answer statistics questions will participate on this site, which may come down to whether they see themselves as mathematicians. If you don't get any answers from statisticians in the next week, maybe you should make a proposal for a new community and see whether there's any response there.