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Sickle celldisease 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. The researchers then counted the number of episodes of plan reported by each subject.

What is the population of interest and what is the size of the sample in this study?

a. African Americans with sickle-cell disease in the US: 150

b. Human red blood cells; 300

c. African Americans with sickle-cell disease in the US: 300

d. Human red blood cells; 150

Respuesta :

Answer:

The answer is c. African Americans with sickle-cell disease in the US: 300

Step-by-step explanation:

1. The population of interest, as told to us in the description is, African Americans.

2. 300 subjects with sickle-cell anemia participated in this study:

150 subjects were given a drug to help with the pain and 150 subjects were given a placebo

150 + 150 = 300