An observational study
A)analyzes data already available.
B)makes it possible to rule out factors over which the researcher has no control for the observed effects.
C)examines individuals that have been selected by the researchers.
D)allows researchers to control for all extraneous factors.

Question

Quizplus · Accepted Answer

Observational studies primarily analyze data that is already available or collect new data without manipulating the study environment or variables. They observe and record events as they naturally occur.

An Observational Study