A group of students were polled to find out how many were planning to major in a scientific field of study in college. The results of the poll are shown in the two-way table. Which of the following statements is true? A. Three hundred sixty students were polled in all. B. A student in the senior class is more likely to be planning on a scientific major than a nonscientific major. C. A student planning on a scientific major is more likely to be a junior than a senior. D. More seniors than juniors plan to enter a scientific field of study. \($$\begin{matrix} \text{Majoring in a science field}\ \quad & \quad & \text{Yes} & \text{No}\ \text{Class} & \text{Junior} & \text{150} & \text{210}\ \quad & \text{Senior} & \text{112} & \text{200}\ \end{matrix}$$\)

Complete the two-way table. \(\begin{array}{|c|cc|c|} \hline \text{ Class } & \text { Response } & \text { } & \text { } \\ \hline & \text { Yes } & \text { No } & \text { Total } \\ \hline \text { Junior } & 65 & & 105 \\ \hline \text { Senior } & & 12 & \\ \hline \text { Total } & 116 & & \\ \hline \end{array}\)

Classify each of the studies as either descriptive or inferential. Explain your answers. In an article titled “Teaching and Assessing Information Literacy in a Geography Program "(Journal of Geography, Vol. 104, No. 1, pp. 17-23), Dr. M. Kimsey and S. Lynn Cameron reported results from an on-line assessment instrument given to senior geography students at one institution of higher learning. The results for level of performance of 22 senior geography majors in 2003 and 29 senior geography majors in 2004 are presented in the following table. Level of performance Met the standard: \(36-48\) items correct Passed at the advanced level: \(41-48\) items correct Failed: \(0-35\) items correct Percent in 2003 82%50%18% Percent in 2004 93%59%7% Level of performance Met the standard: \(36-48\) items correct
Passed at the advanced level: \(41-48\) items correct
Failed: \(0-35\) items correct
Percent in 2003
82%
50%
18%
Percent in 2004
93%
59%
7% ​ ​

You randomly survey students in your school about whether they have a pet. You display your results in the two-way table. How many female students took the survey?
\(\begin{array}{|c|c|}\hline & \text{Gender} \\\hline & \text{Male} & \text{Female}\\ \hline \text{Pet} \\ \hline \text{Yes} & 33 & 35 \\ \hline \text{No} & 8 & 11 \\ \hline \end{array}\)

Complete the two-way table.

\(\begin{array}{|c|cc|c|} \hline \text{ Class } & \text { Response } & \text { } & \text { } \\ \hline & \text { Yes } & \text { No } & \text { Total } \\ \hline \text { Junior } & 65 & & 105 \\ \hline \text { Senior } & & 12 & \\ \hline \text { Total } & 116 & & \\ \hline \end{array}\)

You randomly survey students in your school. You ask whether they have jobs. You display your results in the two-way table. How many male students do not have a job?

\(\begin{array}{} &&Job\\ Gender & Male&27&12 \\ & Female&42&17\\ \end{array}\) ​

A group of children and adults were polled about whether they watch a particular TV show. The survey results, showing the joint relative frequencies and marginal relative frequencies, are shown in the two-way table.

\(\begin{array}{c|c|c| c} & Yes & No & Total \\ \hline Children & 0.3 & 0.4 & 0.7 \\ Adults & 0.25& x & 0.3 \\ \hline Total & 0.55 & 0.45 & 1 \end{array}\)

What is the value of x?