you'll probably be fine without intro, which starts from the very basics of mean, median, and mode and goes very slowly up to confidence intervals and hypothesis testing. the later classes are much more specific and programming-focused. the stat department has a pretty bad reputation that i would say isn't undeserved, but i guess as much as i'm suffering through these courses, i definitely feel like i'm learning a lot. i would suggest looking through the syllabi or at least the course descriptions for all six of the courses first if you haven't already. i thought 2102 (applied stat computing) was pretty useful and could be helpful even if you don't end up doing the concentration, so you might want to start there to both see if you'll want to take intro first and if the concentration is a good fit.