Instruction 2 -Referring to Instruction 2

question 123

Multiple Choice

Instruction 2.9
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 2.9,if the sample is a good representation of the population,we can expect _________ % of those who did poorly on the exam to have spent the weekend studying.

• A) 22.22
• B) 50
• C) 45
• D) 10

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