Is it cheaper to rent a dorm, or to have an apartment when in college (California)

Is it cheaper to rent a dorm, or to have an apartment when in college (California)?
If in California , is it cheaper to live in a dorm, or to have your own apartment for college?
Financial Aid - 1 Answers
People's Answers, Critics, Comments, Opinions :
Answer 1 :
Cheaper to share an apartment.