predicted IQ of the twin born second, given that the twin born first has an IQ of 107? What does the r value tell you about the relationship between the IQ scores of twins? What is the Value for r squared? What does the r squared statiscic mean in this scenario?

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Suppose IQ scores were obtained from randomly selected twins. For 20 such pairs of people, the linear correlation coefficient is r = 0.914 and the equation of the regression line is y = 9.87+0.9x, where x represents the IQ score of the twin born first and y represents the IQ score of the twin born second. What is the best
predicted IQ of the twin born second, given that the twin born first has an IQ of 107?
What does the r value tell you about the relationship between the IQ scores of twins?
What is the Value for r squared? What does the r squared statiscic mean in this scenario?

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