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

question 91

Multiple Choice

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 those who did poorly on the exam to have spent the weekend studying.

• A)22.22
• B)50
• C)45
• D)10

---

Definitions:

Sleep Deprivation

A condition resulting from insufficient sleep, which can negatively affect brain function, cognitive performance, and physical health.

Dependent Variable

The variable in an experiment that is observed and measured to assess the effects of the independent variable, essentially the outcome of interest.

Scientific Method

A systematic, empirical approach to research, characterized by observation, hypothesis testing, experimentation, and conclusion.

Self-correcting

Capable of making necessary adjustments or corrections on one's own to maintain accuracy or functionality.