im betting you can't sign up for 2c03 b/c it requires registration in an honors program
BIOLOGY 1A03, 1M03 (or 1AA3), CHEM 1AA3; or ISCI 1A24; and registration in an Honours program in the Faculty of Science, or a program in Arts & Science, Health Sciences or Kinesiology
-if you're in 1st year right now, then that's probably why. you should go talk to an academic advisor.
also you can find who's teaching on the master timetable. here's the link:
https://adweb.cis.mcmaster.ca /mtt/
(i dont actually see a professor for stats 2b03 on there)