Suppose iq scores were obtained from randomly selected twins. for 20 such pairs of people, the linear correlation coefficient is 0.897 and the equation of the regression line is modifyingabove y with caret equals 10.27 plus 0.88 x, where x represents the iq score of the twin born second. also, the 20 x values have a mean of 100.11 and the 20 y values have a mean of 98.1. what is the best predicted iq of the twin born first, given that the twin born second has an iq of 90? use a significance level of 0.05.