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Markup /brabant/4626
Comment
>>4625 The differences are way too large to trust these studies. What would cause the levels to rise so sharply in the Netherlands, or fall in Brazil? There many ways in which such a study can be fucked up: not taking into account the age structure (countries with younger populations will have higher testosterone levels on average), non-representative sampling based on the availability of willing subjects (training men will have higher levels, father will have lower etc.), math errors.