Chapter PI, Problem 28RE

(a)

To determine

To find out what percent of these students are oldest or only children.

Answer to Problem 28RE

  $50.67\%$ .

Explanation of Solution

In the question, researchers want to find out is your birth order related to your choice of major. Thus the table related to it is given in the question which shows the birth order and the major of subjects. Thus, the percent of these students are oldest or only children can be calculated by using the table given is as:

  $\begin{array}{l}=\frac{113}{223}\\ =0.5067\\ =50.67\%\end{array}$

(b)

To determine

To find percent of humanities majors are oldest children.

Answer to Problem 28RE

  $34.88\%$ .

Explanation of Solution

In the question, researchers want to find out is your birth order related to your choice of major. Thus the table related to it is given in the question which shows the birth order and the major of subjects. Thus, the percent of humanities majors are oldest children can be calculated by using the table given in the question as:

  $\begin{array}{l}=\frac{15}{43}\\ =0.3488\\ =34.88\%\end{array}$

(c)

To determine

To find out what percent of oldest children are humanities students.

Answer to Problem 28RE

  $13.27\%$ .

Explanation of Solution

In the question, researchers want to find out is your birth order related to your choice of major. Thus the table related to it is given in the question which shows the birth order and the major of subjects. Thus, the percent of oldest children are humanities students can be calculated by using the table given in the question as:

  $\begin{array}{l}=\frac{15}{113}\\ =0.1327\\ =13.27\%\end{array}$

(d)

To determine

To find out what percent of the students are oldest children majoring in humanities.

Answer to Problem 28RE

  $6.73\%$ .

Explanation of Solution

In the question, researchers want to find out is your birth order related to your choice of major. Thus the table related to it is given in the question which shows the birth order and the major of subjects. Thus, the percent of the students are oldest children majoring in humanities can be calculated by using the table as:

  $\begin{array}{l}=\frac{15}{223}\\ =0.0673\\ =6.73\%\end{array}$