On the Area 51's Music Fans page, I read:
1.6 answer ratio
Okay – 2.5 answers per question is good, only 1 answer per question needs some work. On a healthy site, questions receive multiple answers and the best answer is voted to the top.
In Music Fans, a majority of questions are ID, and in these questions, only one answer - the good one - is necessary. It would mean that non ID questions will need 4, 5 answers to reach the 2.5 answers per question average.
I understand the other goals that are signs of healthy activity, but what about that one?