Exhibit 11-2
Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year's student body showed the following number of students in each classification.
$\begin{array}{ll}
\text { Freshmen } & 83 \
\text { Sophomores } & 68 \
\text { Juniors } & 85 \
\text { Seniors } & 64
\end{array}$ We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year.
-Refer to Exhibit 11-2. The expected frequency of seniors is
A) 60
B) 20%
C) 68
D) 64

Question

Exhibit 11-2
Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year's student body showed the following number of students in each classification.
 $\begin{array}{ll}
\text { Freshmen } & 83 \
\text { Sophomores } & 68 \
\text { Juniors } & 85 \
\text { Seniors } & 64
\end{array}$ We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year.
-Refer to Exhibit 11-2. The expected frequency of seniors is
A) 60
B) 20%
C) 68
D) 64

Quizplus · Accepted Answer

The expected frequency of seniors is calculated by multiplying the total sample size (300) by the proportion of seniors from last year (20%), which equals 60.

Exhibit 11-2 Last School Year, the Student Body of a Local

Exhibit 11-2
Last School Year, the Student Body of a Local