What is the primary difference between an observational and an experimental study?
A) the former does not do random assignment
B) the latter does not define a hypothesis
C) the former does not have groups in the study
D) the latter is done for clinical trials

Question

Quizplus · Accepted Answer

The primary difference between an observational and an experimental study is that in an observational study, the researchers observe outcomes without manipulating the study environment or applying treatments, which means there is no random assignment of participants to different conditions or treatments. Experimental studies, on the other hand, involve the manipulation of variables and random assignment to study the effects of these manipulations.

What Is the Primary Difference Between an Observational and an Experimental