Discover Questions

Calculate μ and σ, where σ is the standard deviation, defined by the following.
σ 2 = ∞ −∞
(x − μ)2p(x) dx? Difficult geometry problem? Does Universe have a gravity constant wouldn't include a magnetic field constant also? My bun/crest is 42 and according to the result reference range it should be between 11-26. What could that mean? Do astronomers also know and study about aliens/ufos and other life out there?