To get an estimate, you would need to look at:
* On-campus housing data: Penn State publishes data on the number of students living in university housing. This represents a significant portion of non-commuters.
* Off-campus housing data: This is harder to find comprehensively. Penn State might have some estimates, but a precise number of off-campus students would be difficult to obtain.
Therefore, you can't find a definitive answer without access to internal Penn State data. You could try contacting the Penn State Office of Institutional Research or a similar department for potentially more detailed information.