Professor McKenzie's research suggests that approximately 30 percent of the variation in SAT scores among a large group of high school students can be attributed to genetic differences among the students.The 30-percent figure represents an assessment of

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The 30-percent figure represents the extent to which SAT scores are determined by genetic differences among students, which is known as heritability.

Professor McKenzie's Research Suggests That Approximately 30 Percent of the Variation