Suppose IQ scores were obtained from randomly selected siblingssiblings. For 20

Question

Suppose IQ scores were obtained from randomly selected siblingssiblings. For 20 such pairs of people, the linear correlation coefficient is 0.963 and the equation of the regression line is y=1.65+1.03x, where x represents the IQ score of the younger childyounger child. Also, the 20 x values have a mean of 97.93 and the 20 y values have a mean of 99.1. What is the best predicted IQ of the older childolder child, given that the younger childyounger child has an IQ of 101? Use a significance level of 0.05.

the best predicted IQ score of the older child is:

Thank you!

Explanation / Answer

The best predicted IQ score of the older child given that the younger childyounger child has an IQ of 101 is

y=-1.65+1.03*101

=102.38

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