The press release titled “Keeping Score When It Counts: Graduation Rates and Academic Progress Rates” (The Institute for Diversity and Ethics in Sport, March 16, 2009) gave the 2009 graduation rates for African American basketball players and for white basketball players at every NCAA Division I university with a basketball program. Explain why it is not necessary to use a paired- samples t test to determine if the 2009 mean graduation rate for African American basketball players differs from the 2009 mean graduation rate for white basketball players for NCAA Division I schools.