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) not statistically dependent.
B) collective exhaustive.
C) not 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) not statistically dependent.
B) collective exhaustive.
C) not mutually exclusive.
D) None of the above.

Quizplus · Accepted Answer

The events 'Did Well on Exam' and 'Studying for Exam' are not mutually exclusive because students can both study for the exam and do well on it, as shown by the 80 students who studied and did well.

Instruction 4 -Referring to Instruction 4