Which of the following would be considered an example of a matched pair or paired data?

Question

A) the mean age of residents in Dayton compared to the mean age of residents in Miami
B) the proportion of rainy days in Seattle compared to the proportion of rainy days in Phoenix
C) the percentage of defective products produced by Company A compared to the percentage produced by Company B
D) the math scores of current 9th-grade students compared with their 8th-grade math scores

Answer 1

The example that would be considered a matched pair or paired data is:

D) the math scores of current 9th-grade students compared with their 8th-grade math scores.

In this case, each student serves as their own pair, and their scores are directly related, allowing for a comparison of their performance over time. The other options involve comparisons between different groups or entities without direct pairing.