Say, for example, that I want to determine the market share or relative popularity of coffee houses within a certain population through a survey. What is the best way to write a question that accurately measures this?
Some issues that I am thinking of:
I don't want to ask a single choice question ("Which coffee house do you go to?"), because the coffee houses are not mutually exclusive. I may enjoy more than one equally often.
If I ask a multiple choice question, then I can't really get a real "market share," since the sum of the proportions of people who go to each coffee house sum to over 100%. I can only say that "x% of people in this population go to this coffee house."
Is it possible to ask a series of questions ("Which coffee house do you prefer the most?" "Which coffee house do you prefer the second most?", or "Rank the following coffee houses")?
Can I ask a multiple choice question then rebase the proportion to the total number of responses? For example, if I have 100 respondents, but they selected 200 coffee houses (because each respondent said they went to two coffee houses, maybe), can I calculate a frequency table based on 200, the number of selections, instead of the number of respondents?