TABLE 4-2
An alcohol awareness task force at a Big-Ten university sampled 200 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following result was obtained.

-Referring to Table 4-2, the events "Did Well on Midterm" and "Studying for Exam" are
A) statistically dependent.
B) mutually exclusive.
C) collective exhaustive.
D) None of the above.

Question

TABLE 4-2
An alcohol awareness task force at a Big-Ten university sampled 200 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following result was obtained.
 
-Referring to Table 4-2, the events "Did Well on Midterm" and "Studying for Exam" are
A) statistically dependent. 
B) mutually exclusive. 
C) collective exhaustive. 
D) None of the above.

Quizplus · Accepted Answer

The events "Did Well on Midterm" and "Studying for Exam" are statistically dependent because the results show that students who studied for the exam were more likely to do well on the midterm.

TABLE 4-2 An Alcohol Awareness Task Force at a Big-Ten University Sampled