If the r 2 (r-squared) value for the relationship between brain size and IQ is .
ID: 3388703 • Letter: I
Question
If the r2 (r-squared) value for the relationship between brain size and IQ is .09, then
Question 7 options:
30% of one's IQ is accounted for by variability in brain size.
0.81% of one's IQ is accounted for by variability in brain size.
9% of the variability in IQ is accounted for by variability in brain size.
30% of the variability in IQ is accounted for by variability in brain size.
30% of one's IQ is accounted for by variability in brain size.
0.81% of one's IQ is accounted for by variability in brain size.
9% of the variability in IQ is accounted for by variability in brain size.
30% of the variability in IQ is accounted for by variability in brain size.
Explanation / Answer
ANS: 9% of the variability in IQ is accounted for by variability in brain size.
Reason: An R2 of 1 indicates that the regression line perfectly fits the data, while an R2 of 0 indicates that the line does not fit the data at all