Instruction 2-6
A sample of 200 students at a large university was taken after the final exam to ask them whether they went out on the weekend before the exam or spent the weekend studying,and whether they did well or poorly on the exam.The following table contains the result.
$$\begin{array} { | l | l | l | }
\hline & \text { Did Well on Exam } & \text { Did Poorly on Exam } \
\hline \text { Studying for Exam } & 80 & 20 \
\hline \text { Went out on the weekend } & 30 & 70 \
\hline
\end{array}$$
-Referring to Instruction 2-6,if the sample is a good representation of the population,we can expect ________ percent of the students in the population to spend the weekend studying and do poorly on the exam.
A)50
B)20
C)45
D)10

Question

Instruction 2-6
A sample of 200 students at a large university was taken after the final exam to ask them whether they went out on the weekend before the exam or spent the weekend studying,and whether they did well or poorly on the exam.The following table contains the result.
 $$\begin{array} { | l | l | l | } 
\hline & \text { Did Well on Exam } & \text { Did Poorly on Exam } \
\hline \text { Studying for Exam } & 80 & 20 \
\hline \text { Went out on the weekend } & 30 & 70 \
\hline
\end{array}$$
-Referring to Instruction 2-6,if the sample is a good representation of the population,we can expect ________ percent of the students in the population to spend the weekend studying and do poorly on the exam.
A)50
B)20
C)45
D)10

Quizplus · Accepted Answer

By looking at the table, we can see that out of the 200 students in the sample, 80 spent the weekend studying and did poorly on the exam. This represents 40% of the sample. If we assume that the sample is a good representation of the population, we can expect the same percentage of students in the population to spend the weekend studying and do poorly on the exam. Therefore, the answer is 40%, which is closest to choice D (10%).

Instruction 2-6 a Sample of 200 Students at a Large

Instruction 2-6
a Sample of 200 Students at a Large