IMO the result of any survey should be treated with a degree of caution. Qualitative surveys tend to have more in depth questions but focus on a lower % of respondents.
Quantitative surveys on the other hand go for more broader based questions and a greater % of respondents.
The result of any survey is also dependent to a certain degree on the questions asked, how they're framed and just as importantly, questions that don't get asked. It's easy enough to create a bias in order to achieve the result you want to get.
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