Two box plots, Group X and Group Y, display the distribution of scores on a standardized test. Group X's median is 75, IQR is 15, and range is 40. Group Y's median is 80, IQR is 10, and range is 30. Which of the following statements is TRUE?

✓ Correct Answer: Option C

Group Y's median is 80. By definition, at least 50% of Group Y scored 80 or higher. Since Group X's median is 75, at least 50% of Group Y scored higher than Group X's median. Options A, B, D cannot be determined as 'necessarily true' from the given summary statistics (e.g., ranges don't guarantee specific highest/lowest values in comparison).