A study examined brain size (measured as pixels counted in a digitized magnetic resonance image [MRI] of a cross section of the brain) and IQ (4 performance scales of the Wechsler IQ test) for college students. The data comprise of the variables, Performance IQ scores (IQ) and Brain Size (Size) and were analyzed in a linear regression model. Use the StatCrunch output to answer the following question. Simple linear regression results: Dependent Variable: IQ Independent Variable: Size IQ-1.743757 +0.0001202538 Size Sample size: 40 R (correlation coefficient) - 0.38681732 R-sq-0.14962764 Estimate of error standard deviation: 20.992707 Which of the following best describes the data? There is a moderate linear association in the negative direction. There is a moderate linear association in the positive direction. There is a strong linear association in the negative direction. There is a strong linear association in the positive direction.

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