It’s all one application, so I would suggest you figure out with your parents how many CSU’s you can afford to apply to, and apply as widely as possible. You haven’t really done enough research at this point to be clear on which ones would be best for you, so keep as many options open as you can.
Use this tool to search majors that are offered at the different CSUs: http://degrees.calstate.edu/
Fullerton is one of the few to offer a Business Analytics concentration, so keep that on the list if you think you might want to tilt your program in that direction, which is great for employment prospects.
What kind of atmosphere do you want? Look at aspects like how many students live on campus… although pure numbers don’t tell the whole story, as being a commuter student in LA is very different from, for example, living off campus in Arcata and attending Humboldt State. I would suggest HSU as a school to consider, as it has an undergrad business program and would be just as much of a change of scene from the Bay Area as heading south. Chico, too, could be worth a look (particularly if its “party school” reputation appeals). Sonoma is excellent and offers a number of different Business concentrations. Sacramento offers the resources of a city and a definite change of scene from the Bay Area, at a convenient distance (and nice access to Sierra recreation if that appeals). Also consider Monterey Bay, which has great residential options on the former Fort Ord campus, and Cal Poly Pomona. And San Diego as suggested above, although SDSU has gotten quite competitive too.
Compare 4-year and 6-year graduation rates as you consider CSUs - they are relatively affordable year-to-year, but take into account that graduating without extra semesters is uncommon at some campuses. Also look at what extracurriculars are offered, and at the course offerings in areas of interest outside your major - for example, could you minor or double-major in graphic design if you wanted to?
If your EFC is in the $30K range or above, you may also want to look at out-of-state publics that offer the WUE rate. You can search these by major as well: http://wue.wiche.edu/search1.jsp Schools like the Nevada flagships, Northern Arizona, Colorado State, U of Utah, U of New Mexico, Southern Oregon, Washington State, and more, have business programs, and many can be more affordable than UC’s (and definitely offer a change of scene) if you don’t need institutional financial aid to get your costs below the WUE price.
More info than you asked for, but in case it’s helpful!