Suppose IQ scores were obtained from randomly selected siblings. For 20 such pai

Question

Suppose IQ scores were obtained from randomly selected siblings. For 20 such pairs of people, the linear correlation coefficient is 0.944 and the equation of the regression line is ^y= -11.95 + 1.17x, where x represents the IQ score of the younger child. Also, the 20 x values have a mean of 92.07 and the 20 y values have a mean of 96.1. What is the best predicted IQ of the older child, given that the younger child has an IQ of 106? Use a significance of 0.05.

The best predicted IQ of the older child is ?

Explanation / Answer

The linear correlation coefficient = 0.944

This is significant because it is greater than the critical value. Hence,

Best predicted IQ score = -11.95 + 1.17*106 = 112.07

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.