Question: Brain Size and Intelligence. The table below lists brain sizes (in cm3) and Wechsler IQ scores of subjects (based on data from Brain Size, Head

Brain Size and Intelligence. The table below lists brain sizes (in cm3) and Wechsler IQ scores of subjects (based on data from "Brain Size, Head Size, and Intelligence Quotient in Monozygatic Twins," by Tramo et al, Neurology, Vol. 50, No. 5). Is there sufficient evidence to conclude that there is a linear correlation between brain size and IQ score? Does it appear that people with larger brains are more intelligent?

a. Construct a scatterplot for the data.
b. Briefly characterize the correlation in words and estimate the correlation coefficient.

Brain Size Q Brain SizeIQ 965 1,029 1,030 1,285 1,049 90 85 86 102 103 1,077 1,037 1,068 1,176 1,105 97 124 125 102 114

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a b There is a slight positive correlation r 0179 ... View full answer

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