IQ and school GPA. Figure 14.10 (page 302) plots school grade point average (GPA) against IQ test
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IQ and school GPA. Figure 14.10 (page 302) plots school grade point average (GPA) against IQ test score for 78 seventh-grade students. There is a roughly straight-line pattern with quite a bit of scatter. The correlation between these variables is r = 0.634. What percentage of the observed variation among the GPAs of these 78 students is explained by the straight-line relationship between GPA and IQ score? What percentage of the variation is explained by differences in GPA among students with similar IQ scores?
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Related Book For 
Statistics Concepts And Controversies
ISBN: 9781429277761
7th Edition
Authors: David S Moore, William I Notz
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