The Table Below Provides Summary Information About the Students in a Class.The

question 6

Multiple Choice

The table below provides summary information about the students in a class.The sex of each individual and their age is given. $$\begin{array} { | l | c | c | c | } \hline & \text { Male } & \text { Fernale } & \text { Total } \\\hline \text { Under 20 yrs old } & 10 & 8 & 18 \\\hline \begin{array} { l } \text { Between } 20 \text { and } 25 \\\text { yrs old }\end{array} & 12 & 18 & 30 \\\hline \text { Older tharn 25 yrs. } & 26 & 26 & 52 \\\hline \text { Total } & 48 & 52 & 100 \\\hline\end{array}$$ A student is randomly selected from this group, and it is found that the student is older than 25 years.What is the probability that the student is a male?

• A)0.21
• B)0.10
• C)0.50
• D)0.54
• E)0.26

---

Definitions:

Experimental Group

In an experiment, the group of participants that receives the treatment or intervention under investigation, as opposed to the control group.

Random Assignment

Assigning participants to experimental and control groups by chance, thus minimizing preexisting differences between the different groups.

Test Difficulty

The measure of how challenging an examination or a set of questions is, often determined by the proportion of test-takers who answer correctly.

Experimental Group

The group in an experiment that receives the variable being tested, contrasted with a control group that does not.