Compared with experiments, one drawback of observational studies is that they lack:

A) a detailed statistical analysis
B) scientific objectivity
C) real scientific value
D) a clear methodology
E) a randomly assigned control group

Randomly Assigned Control Group

A group of subjects in an experiment that is randomly selected to not receive the treatment, allowing for a comparison to evaluate the effect of the treatment.

Observational Studies

Research methods that involve assessing subjects without manipulating the environment or the participants, used to identify and describe natural occurrences.