Let's say that N randomly chosen persons where asked a question where the answer could be in either of X categories. For example, 500 persons where asked which of the top 5 political parties they support the most. Each person can give only one answer.
How do I determine if the leading party which, for example, got 33 % is truly larger than the 2nd largest party that got 29 % (on a certain confidence level).
Calculations like these solve my question when there are only two choices, but how about my case when there are several? http://www.stat.wmich.edu/s216/book/node85.html