Question: A study shows that the correlation between head circumference and IQ score is 0.50.If a least-squares regression was performed, which of the following would be

A study shows that the correlation between head circumference and IQ score is 0.50.If a least-squares regression was performed, which of the following would be true?(Select all that apply)

50% of the varability in head circumference is explained by IQ score

25% of the varability in IQ score is explained by head circumference

25% of the varability in head circumference is explained by IQ score

50% of the varability in IQ score is explained by head circumference

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