Can someone help clear up confusion regarding how curves work in Bio/Chem classes?

<p>So from what I understand is that in a curved class the mean is regarded as a B- (ish), and that one standard deviation over is equal to a high B/B+, two s.d's above is an A, so on and so forth.
Is this correct? Or does the curve work in another way
Also please add any other info you have that might help to answer the question
Thanks guys!</p>

<p>I think it depends on the professor, who determines what grade the mean will be. I think sometimes it’s a C+ and sometimes it’s a B-. Usually in my classes I believe getting exactly the mean is a C+ and a few points above might get you a B-. One full standard deviation will get you either a B+ or an A-. That’s usually the case, but also remember the a “curved” class in bio also usually means that the top 15/17% of the class will get A’s. And then the next 30% get B’s, etc.</p>