Mathematics, 15.04.2020 15:52 taekookie01
Sickle-cell disease is a painful disorder of the red blood cells that in the United States affects mostly African Americans. To investigate whether the drug hydroxyurea can reduce the pain associated with sickle-cell disease, a study by the National Institutes of Health gave the drug to 150 sickle-cell sufferers and a placebo to another 150 sufferers. The researchers then counted the number of episodes of pain reported by each subject. What is the response variable in this study?
1. The presence of sickle-cell disease
2. The drug hydroxyurea
3. The number of red blood cells
4. The Number of episodes of pain
Answers: 1
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