Suppose iq scores were obtained from randomly selected siblings. for 20 such pairs of people, the linear correlation coefficient is 0.912 and the equation of the regression line is modifyingabove y with caret equals negative 12.25 plus 1.13 x, where x represents the iq score of the younger child. also, the 20 x values have a mean of 98.01 and the 20 y values have a mean of 98.5. what is the best predicted iq of the older child, given that the younger child has an iq of 107? use a significance level of 0.05. click the icon to view the critical values of the pearson correlation coefficient r.