What I would do is compute a linear (or otherwise) regression between random number and height guessed. It would have also helped to have a control group to answer the question without anchoring, to determine what sort of background information people have, but that’s not strictly necessary.
I would only do that with respondents from the US—having to convert from metres to feet is likely to weaken the anchoring effect for respondents from elsewhere.
What I would do is compute a linear (or otherwise) regression between random number and height guessed. It would have also helped to have a control group to answer the question without anchoring, to determine what sort of background information people have, but that’s not strictly necessary.
I would only do that with respondents from the US—having to convert from metres to feet is likely to weaken the anchoring effect for respondents from elsewhere.
Of course, I’m a respondent from the US and I answered the question by converting from meters. So this approach isn’t foolproof.