Alright, I guess I was confused because I had seen this screenshot at a UCLA site and some other descriptions that seemed to match that.
I still have an unresolved issue, though. There's an excellent ( but 3-year old) set of instructions for setting up course evaluations with the questionnaire tool at <http://faculty.npc.edu/edtec/forum/files/126b4feef76c57fd58d227e65a39b330-9.html>
It describes creating a questionnaire in one course site and setting it to Public, then creating a questionnaire activity in a second site that uses that public questionnaire. It explicitly describes setting that second instance to be Private, but it seems to me that that second instance has no Advanced Tab available. The idea was to let students access a questionnaire where the instructor couldn't access the results. (I got around the problem by explicitly removing instructor permissions.)