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Andru [333]
3 years ago
12

Which of the following is an advantage of an observational study over a sample survey? A)Observational studies are not dependent

on people’s responses, which may not be truthful.
B)Observational studies involve the random selection of subjects.
C)Observational studies do not manipulate variables.
D)Observational studies do not involve treatments.
Mathematics
1 answer:
Law Incorporation [45]3 years ago
3 0
I think it is B)Observational studies involve the random selection of subjects.
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