Several decades ago, the gap between the IQ scores of African Americans and White Americans was estimated to be about 15 IQ points. Research from 2002 suggests that in 30 years that gap closed by about ________ points.

Question

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Research from 2002 indicates that over a period of 30 years, the gap in IQ scores between African Americans and White Americans closed by about 4 to 7 points.

Several Decades Ago, the Gap Between the IQ Scores of African