I have roughly 30 surveys (one for each of 30 schools). They all asked the same Likert item questions. For each item, I want to know if any of the results are significant. That is, I want to know if any of the schools stand out among the others either positively or negatively. What should I do?
We asked parents from 30 different schools 20 questions about their school. I have made bar charts of the schools on the same graph so I can see generally how the schools compare to each other. I could rank order the schools based on their top box or top two box scores for each question. I guess I thought I could figure out if any of the schools did significantly better or worse than any others using some test of statistical significance.
Most schools look pretty similar on any given item and I would suspect that their scores are "the same". I want to know how different scores would have to be to be considered different