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Suppose IQ scores were obtained from randomly selected sibling. For 20 such pairs of people,
the linear correlation is 0.917 and the equation of the regression line is y=6.44+0.94x, where x
represents IQ score of the younger child. Also, the 20 x values have a mean of 102.87 and the 20
y values have a mean of 103.25. What is the best predicted IQ of the older child, given that the
younger child has an IQ of 107? The best predicted IQ of the older child is(Round answer to one
decimal place)?
Solution
answer=107.02

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Suppose IQ scores were obtained from randomly selected sibling. For .pdf

  • 1. Suppose IQ scores were obtained from randomly selected sibling. For 20 such pairs of people, the linear correlation is 0.917 and the equation of the regression line is y=6.44+0.94x, where x represents IQ score of the younger child. Also, the 20 x values have a mean of 102.87 and the 20 y values have a mean of 103.25. What is the best predicted IQ of the older child, given that the younger child has an IQ of 107? The best predicted IQ of the older child is(Round answer to one decimal place)? Solution answer=107.02