I'm doing statistical formulas and need the keyboard shortcut of the symbol used to represent standard deviation (sigma), which should look like (σ). Everything online suggests using the keyboard shortcut for option + w, but when I use that shortcut I get, ∑ instead. I've tried searching OS settings and there doesn't seem to be a place to change or determine what is the proper keyboard shortcut. The keyboard shortcut for statistical mean (mu) is working, µ And greater than or equal to, ≥ And less than or equal to, ≤ are also working.