Suppose IQ scores were obtained from randomly selected siblings. For 20 such pai

Question

Suppose IQ scores were obtained from randomly selected siblings. For 20 such pairs of people, the linear coefficient is 0.924 and the equation of the regression line is y - 11.01 + 1.11x where x represents the IQ score of the younger child. Also the 20 x values have a mean of 102.56 and 20 y values have a mean of 102.75. What is the best predicted IQ of the older child, given that the younger child has an IQ of 107? Use significance level 0.05. The best predicted IQ of the older child is: _____________(round to two decimal places) (Show Work)

Explanation / Answer

As

y^ = -11.01 + 1.11x

then if x = 107, then

y^ = -11.01 + 1.11*107 = 107.76 [ANSWER]

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As for the best predicted IQ, the other given won't matter for this part. Thanks!

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