Instruction 4.2
An alcohol awareness task force at a large Australian university sampled 200 students after the final exam to ask them whether they went out to a pub on the weekend before the exam or spent the weekend studying, and whether they did well or poorly on the exam. The following result was obtained.
$$\begin{array} { | l | l | l | }
\hline & \text { Did Well on Exam } & \text { Did Poorly on Exam } \
\hline \text { Studying for Exam } & 80 & 20 \
\hline \text { Went to a pub } & 30 & 70 \
\hline
\end{array}$$
-Referring to Instruction 4.2,the events 'Did Well on Exam' and 'Studying for Exam' are
A) statistically dependent.
B) collective exhaustive.
C) mutually exclusive.
D) None of the above.

Question

Instruction 4.2
An alcohol awareness task force at a large Australian university sampled 200 students after the final exam to ask them whether they went out to a pub on the weekend before the exam or spent the weekend studying, and whether they did well or poorly on the exam. The following result was obtained.
 $$\begin{array} { | l | l | l | } 
\hline & \text { Did Well on Exam } & \text { Did Poorly on Exam } \
\hline \text { Studying for Exam } & 80 & 20 \
\hline \text { Went to a pub } & 30 & 70 \
\hline
\end{array}$$
-Referring to Instruction 4.2,the events 'Did Well on Exam' and 'Studying for Exam' are
A) statistically dependent.
B) collective exhaustive.
C) mutually exclusive.
D) None of the above.

Quizplus · Accepted Answer

The events 'Did Well on Exam' and 'Studying for Exam' are statistically dependent because the data shows a relationship between studying for the exam and exam performance, with 80 out of 100 students who studied doing well, compared to 30 out of 100 who went to a pub.

Instruction 4 -Referring to Instruction 4