Exhibit 7-13: an Investigator Wished to Look at the Relationship

Multiple Choice

Exhibit 7-13: An investigator wished to look at the relationship between the aspirations of high school juniors for a college education and their current grade point averages.He asked 150 high school juniors whether or not they wanted to attend college.The following data were obtained:
$\begin{array}{lllll} &&&GPA\\& & \text { Below average } & \text { Average } & \text { Above average } \\\text { Aspiration } & \text { Yes } & 15 & 25 & 35 \\\text { to attend College } & \text { No } & 35 & 25 & 15\end{array}$
Apply the X² test to the above data and then answer the following questions.
-Refer to Exhibit 7-13.The expected frequency for above-average students who want to attend college is

A) 15.
B) 20.
C) 25.
D) 35.