How important is the academic staff to student ratio? I've been looking at some universities abroad (I'm from Norway) like in Hong Kong (HKUST), but the academic staff to student ratio seems dreadful compared to others with 1:23. Still, people seem to think it's a really great place to go. Also, it's ranked 19th in the world in the course I want to take, Mechanical Engineering, despite this.

So, my question is, how much weight should I put in this ratio? Will it impact my education greatly when the ratio is so high?
If the ratio is about undergrad students, I wouldn't worry too much: those figures may vary wildly without the quality of the education dispensed being affected. For one thing, academic staff may not be all teachers, proportion of research vs. teaching time may vary, degree of implication of PhD teaching assistants (which do not count as academic staff) is not included, …

(The value given, 1:23, makes me assume that's what you mean)



On the other hand, if the ratio is about “grad students” and/or “PhD students” to academic staff, then yeah, you should give it a careful look. If the ratio is too low, run away fast! There are places that take too many grad students, if they can manage the funding, but won't have the human resources to advise/tutor/supervise them as they should. Trust me, you don't want to be in such a place.