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Mathematics, 06.12.2020 01:00 genyjoannerubiera

I've been having trouble with this and need help! Please? Rhea has decided to survey only patients who have been actively following a Mediterranean diet for at least six months. She has grouped these patients by age: 40-49 years, 50-59 years, and 60-69 years. Given these age groups, how should she choose her sample to find the effects of the Mediterranean diet? Why?

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I've been having trouble with this and need help! Please? Rhea has decided to survey only patients...
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