Which of the following is an example of paired data?
A) A random sample of students is asked how much money they made during the past summer. Results for males and females are compared.
B) A randomized experiment is done in which volunteers who want to lose weight are randomly assigned to either follow a specified diet or participate in an exercise program for 6 months. At the end of the study the two groups are compared to see which one had a higher proportion of people drop out of the study.
C) An observational study is conducted on a random sample of married couples to compare the average number of hours worked per week for the husband and the wife.
D) A random sample of students is asked on the first day of the quarter how many hours they slept the night before. The question is repeated for a new random sample of students on the first day of finals week.

Question

Quizplus · Accepted Answer

Paired data involves observations that are linked or related in some way, such as measurements taken from the same individual or unit at different times or under different conditions. In choice C, the number of hours worked per week is compared for husbands and wives within the same married couples, making it an example of paired data because the measurements (hours worked) are inherently linked by the marital relationship.

Which of the Following Is an Example of Paired Data