Like I said in the other discussion, my only knowledge of whether to submit one or not is from an email response that I received last year that said, "You will not need to submit your statement of purpose as it is not a basis of admissions, but you may include it if you like." I know that other people in my cohort submitted one and they think that it was what made them stand out and be accepted. It is a personal choice on whether to submit one or not. I was submitting my application with only a couple days left til the deadline and I didn't want to submit one unless it was perfect. I didn't feel like writing one last minute would benefit me at all, but if you have one that you feel will help your application, do it!
@OTYoga If you look at CSUDH Discussion on this site, you can see a bunch of stats of people that made it and didn't make it last year and in previous years. The stats really varied in all areas and there is no perfect set of stats that will guarantee admittance.
I'll re-post my stats here for you:
Undergrad GPA: 3.78
Prereqs: All A's, except for one B in stats
GRE: V-148 Q-150 AWA-4
Volunteer Hours: 82 at a pediatric clinic
3 great LORs
I also didn't have any other work related experience, so don't worry too much and just hope for the best!