Question

Suppose IQ scores were obtained from randomly selected siblings. For 20 such pairs of people, the linear correlation coefficient is 0.916 and the equation of the regression line is ý = - 3.14 +1.02x, where x represents the IQ score of the younger child. Also, the 20 x values have a mean of 103.21 and the 20 y values have a mean of 102.1. What is the best predicted IQ of the older child, given that the younger child has an IQ of 95? Use a significance level of 0.05. Click the icon to view the critical values of the Pearson correlation coefficient r. The best predicted IQ of the older child is (Round to two decimal places as needed.)

Answer 1

Given regression line دعو = -3.14 +1.02 x x put x=95 ♡ = -3.14.t1.02 x 95 دعو - 93.76

the best predicted IQ of the the older child is 93.76