I assume you mean compressed bitrates.
It depends on what encoder you are using and whose ears are forming the opinion. For mp3 encoding, LAME provides a number of preset encoding options that might give you an idea.
The --alt-preset standard setting averages about 192 kbps (variable bit rate), and is generally considered to be very good quality. The --alt-preset extreme setting averges about 256 kbps (also variable bit rate), and to most people is CD quality. The --alt-preset insane setting tops out at 320 kbps (constant bit rate) and is indistinguishable, by mere mortals, from a completely uncompressed stream.
Of course, all of these are subjective, and open to interpretation by the listener.