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How can one control variables but ensure that the population is representative?

Usually, you want to control variables within a study. However, you also want to obtain a representative population to the population that you're measuring. How can one even strike a balance between ...
Mathematician's user avatar
6 votes
3 answers
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How to check whether a sample is representative across two dimensions simultaneously?

I'm attempting to develop a standardized method to check whether one set of locations are representative of a larger set. In this particular case, I'm attempting to look specifically at their ...
Greg's user avatar
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