Universities exist on a continuum between two extremes: research and teaching.
Caltech is an example of a pure research university. It has a relatively small number of students at 2,209, with more postgraduate students than undergraduates (1,226 to 983) and 3 students per faculty member (including research scholars).[1][2]
The California State University system is an example of a (relatively) pure teaching university system. It has 7.4 undergraduates to postgraduates (392,951 to 53,229) and 20 students per faculty member.[3][4]
Caltech is an example of a pure research university. It has a relatively small number of students at 2,209, with more postgraduate students than undergraduates (1,226 to 983) and 3 students per faculty member (including research scholars).[1][2]
The California State University system is an example of a (relatively) pure teaching university system. It has 7.4 undergraduates to postgraduates (392,951 to 53,229) and 20 students per faculty member.[3][4]
[1]: https://en.wikipedia.org/wiki/California_Institute_of_Techno...
[2]: http://www.caltech.edu/at-a-glance/
[3]: https://en.wikipedia.org/wiki/California_State_University
[4]: http://www.calstate.edu/pa/2013Facts/documents/facts2013.pdf