Researchers wondered whether the size of a person\'s brain was related to the in

Question

Researchers wondered whether the size of a person's brain was related to the individual's mental capacity. They selected a sample of 3 females and 3 males and measured their MRI counts and IQ scores. The data is reported on the right. Treat the MRI count as the explanatory variable. Compute the linear correlation coefficient between MRI count and IQ for both the males and the females. Do you believe that MRI count and IQ are linearly related? The linear correlation coefficient for females is ___. The linear correlation coefficient for males is ____. (Round to three decimal places as needed.)

Explanation / Answer

a) The statistical software output for this problem is:

Correlation between MRI and IQ is:
-0.011996311

Hence,

The linear correlation coefficient for females is -0.012

b) The statistical software output for this problem is:

Correlation between MRI and IQ is:
-0.18951792

Hence,

The linear correlation coefficient for males is -0.190

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