Suppose a group of students who reported smoking marijuana was found to have lower test scores than a group of students who reported they don't smoke marijuana.What is the most that can be concluded with regard to the population of all students?
A)Smoking marijuana causes lower test scores.
B)Smoking marijuana may be related to lower test scores.
C)Students who smoke marijuana have lower test scores than students who don't.
D)None of the above.

Question

Quizplus · Accepted Answer

The study shows a correlation between smoking marijuana and lower test scores, but correlation does not necessarily mean causation. While it is possible that smoking marijuana may be related to lower test scores, it cannot be definitively concluded that one causes the other or that all students who smoke marijuana will have lower test scores.

Suppose a Group of Students Who Reported Smoking Marijuana Was