A really great and useful article. Is there a simple way to calculate the 95% CI for the mode of a given data set?

I'm working on a survey related exercise, trying to match the output of a survey (300 responses) to the output of an assessment (1 response). if the assessment response to a specific question is within the 95%CI for the mode, I'd like to say that there is no difference between the two.

Any thoughts on this.