it seems like all the major problems in math/stats are only in math. why is that? is it because stats is a relatively new field of study (got started ~50yrs ago i think by florence nightingale?), not counting gauss' central limit theorem? or is it because statisticians only work with data collected in experiments, making it extremely concrete/experimental compared with math (esp pure math)? (that might come across as more ignorant that i want it to ) what's the equivalent of the riemann hypothesis in statistics, if there is one?