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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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gyoku2302 gyoku2302
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A month ago
In a study that seeks to evaluate the effect that caffeine has on individuals with narcolepsy, 40 patients with this condition are randomly selected to participate. Fifteen of the patients are given high doses of caffeine, 15 are given moderate doses, and 10 are given low doses over a period of 30 days. The total amount of time each patient slept over the 30 days was recorded. This isbestdescribed as a(n) _________________ study.


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voluntary



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observational



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dosage



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experimental

Textbook 
Introductory Statistics: A Problem-Solving Approach

Introductory Statistics: A Problem-Solving Approach


Edition: 3rd
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voltayrevoltayre
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