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Considering two blood tests; potassium and testosterone .
The normal range of potassium is 3.6-5.0 mmol/l
The normal range of testosterone is 225-978 ng/dl (male)
The variance in potassium levels is small and that of testosterone large.
Eventhough the units of measurement differ, can we conclude that the serum level of potassium is about the same for everyone and that testosterone levels wary widely between individuals?
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