Roughly three-quarters of applicants are admitted to Sonoma State, one of the 23 schools in the California State University System. Students with decent grades and test scores have an excellent chance of getting an acceptance. The green and blue dots in the above graph represent accepted students, and you can see that the majority of successful applicants had high school averages of "B" or higher, SAT scores (CR+M+W) of 1400 or higher, and ACT scores of 19 or higher. You'll also see that some students with lower grades and scores also got in. However, note that there are a few red data points (rejected students) in the middle of the graph. Some students with grades and test scores that seem to be on target for Sonoma State will still get rejected.
Unlike the University of California System, the California State University admission process is not holistic. Except for EOP students, applicants do not need to submit letters of recommendation or an application essay, and extracurricular involvement is not part of the standard application. Thus, the reason why an applicant with adequate scores and grades would be rejected tends to come down to a couple factors such as insufficient college preparatory classes or an incomplete application.
To learn more about Sonoma State, high school GPAs, SAT scores and ACT scores, these articles can help: