Chapter 21, Problem 1E

SECTION 18.1

1. Which method? Which of the following scenarios should be analyzed as paired data?

1. a) Students take an MCAT prep course. Their before and after scores are compared.
2. b) 20 male and 20 female students in class take a midterm. We compare their scores.
3. c) A group of college freshmen are asked about the quality of the university cafeteria. A year later, the same students are asked about the cafeteria again. Do student’s opinions change during their time at school?

To determine

Identify the situation that has paired data.

Answer to Problem 1E

The data is analyzed as paired.

Explanation of Solution

Given info:

The data represents the scores of the students in MCAT.

Justification:

The scores of the students were paired because the scores of the students before and after were dependent on the MCAT prep course.

To determine

Identify the situation that has paired data.

Answer to Problem 1E

The data is not paired.

Explanation of Solution

Given info:

The data represents the scores of the males and females students.

Justification:

The scores of the male and female studentswere not pairedbecause the scores of the male is different and independent from the scores of female.

To determine

Identify the situation that has paired data.

Answer to Problem 1E

The data is analyzed as paired.

Explanation of Solution

Given info:

The data represents on selecting the group of freshmen to know the quality of the cafeteria at the beginning and a year later.

Justification:

The data taken from the students were paired because the survey was taken twice from the students. The response of the students was integrated.