Yes, I am a medical student at CCLCM. The reason why I'm asking about these classes is because I am interested in getting an MS in statistics. My math background from college is calc I, calc II, and linear algebra. The statistics program I was looking at requires those three classes, as well as calc III and advanced calculus. From their website, advanced calculus seems to be the same thing as introductory analysis, while calc III appears to be vector calculus like most of you said. The calc III requirement makes sense to me, but I don't really understand why I would need to take a proof-based class like introductory analysis in order to learn stats. I am going to contact the program this week to ask about it. Maybe they do mean differential equations. That would make more sense to me.
Thanks again for all of your help. I had no idea how confusing all of the names of these courses would be!