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If every respondent to a survey like this simply ranks the alternatives, is the result seen here done by just averaging the ranks and then sorting them? And what in the world does "margin of error plus or minus $2.2$ percentage points" mean as applied to something like this?

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    $\begingroup$ I think this can only be answered by getting more details from NBC. $\endgroup$ Commented Sep 9 at 11:14
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    $\begingroup$ Probably, this is the margin of error one would get on a survey of this size, if the results were expressed as percentages (e.g. x% of respondent picked "bla bla" as one of their 3 choices). But the table you showed has no such percentages, so one would have no idea what to add/subtract 2.2 percentage points from? Having said this I also do not think that they ranked anything. It says "each participant was able to pick 3 choices out of 13", not rank 3 choices; so it is probably ranked by the number of choices in each of the 3 groups. $\endgroup$ Commented Sep 9 at 21:25

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