Instruction 2 -Referring to Instruction 2

question 55

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 spent the weekend studying to do poorly on the exam.

• A) 20
• B) 10
• C) 50
• D) 45

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Definitions:

Toxic Substances

Materials or compounds that can cause harm to living organisms when introduced into the body or environment.

Population Size

The total number of individuals within a defined area at a given time, important in understanding ecology and evolutionary biology.

Increase Or Decrease

Terms that indicate a change in magnitude, quantity, or degree, either going up (increase) or going down (decrease).

Dispersal Patterns

The way in which organisms move or spread from their point of origin to other areas, affecting population dynamics and ecosystem structure.