Researchers wondered whether the size of a person\'s brain was related to the in
ID: 3172677 • Letter: R
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.
Female Male
MRI IQ
1,001,121 141
MRI IQ 965,355 132
95I,546 138 935,493 144
857,781 135
856,473 141
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
nothing.
The linear correlation coefficient for males is
nothing.
(Round to three decimal places as needed.)
Explanation / Answer
By using excel function '=correl()' we get
The linear correlation coefficient for females is -0.012
The linear correlation coefficient for males is -0.190
This shows the very poor or no correlation between MRI count and IQ .
We donot believe that MRI count and IQ are linearly related.
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