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. $$\begin{array} { l l }
\text { Freshmen } & 83 \
\text { Sophomores } & 68 \
\text { Juniors } & 85 \
\text { Seniors } & 64
\end{array}$$ 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.The expected number of freshmen is
A) 83.
B) 90.
C) 30.
D) 10.

Question

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. $$\begin{array} { l l } 
\text { Freshmen } & 83 \
\text { Sophomores } & 68 \
\text { Juniors } & 85 \
\text { Seniors } & 64
\end{array}$$   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.The expected number of freshmen is
A) 83.
B) 90.
C) 30.
D) 10.

Quizplus · Accepted Answer

The expected number of freshmen is calculated by multiplying the total sample size (300) by the percentage of freshmen from last year (30%), which equals 90.

Last School Year, the Student Body of a Local University Freshmen 83 Sophomores 68 Juniors 85 Seniors 64\begin{array} { l l } \text { Freshmen } & 83 \\\text { Sophomores } & 68 \\\text { Juniors } & 85 \\\text { Seniors } & 64\end{array} Freshmen Sophomores Juniors Seniors ​83688564​

Last School Year, the Student Body of a Local University $\begin{array} { l l } \text { Freshmen } & 83 \\\text { Sophomores } & 68 \\\text { Juniors } & 85 \\\text { Seniors } & 64\end{array}$