There is a sub-section named "Paging"[1] in the "Data API" section. It explains the Metadata in API responses, so I used this for my answer here.
I used Python's "requests" to communicate with the sandbox API. Below, I'm adding the "paging" response I got for both the endpoints, "students" and "sections".
Students {u'current': 1, u'count': 1004, u'total': 11}
Sections {u'current': 1, u'count': 382, u'total': 4}
As the API docs explains, the 'count' stands for total number of entries the pagination will result in, so average number of students per section will be 1004/382 here.
Now, statistically this will be ~2.63 students per section but I wonder how can you have 63% of a student in a section and 37% in another.
[1] https://clever.com/developers/docs#data-api-overview-paging-section