Final answer:
The described study is a Randomized Comparative Experiment where two groups of math majors are compared for the concentration effect of classical music on Sudoku puzzle-solving.
Step-by-step explanation:
The experiment described in the question is a Randomized Comparative Experiment. In this type of experiment, subjects are randomly assigned to different groups to compare the effect of different conditions. In the study mentioned, the two groups of math majors, one listening to classical music and one in silence, help evaluate the concentration effect of classical music while solving Sudoku puzzles. A Matched Pairs Experiment, for comparison, would involve either the same individuals participating in both conditions or matching individuals across the two groups based on certain characteristics before comparing the results.