Suppose IQ scores were obtained from randomly selected twins. For 20 such pairs

Question

Suppose IQ scores were obtained from randomly selected twins. For 20 such pairs of people, the linear correlation coefficient is 0.894 and the equation of the regression line is y = 2.51 + 0.96x, where x represents the IQ score of the twin bom first. Also, the 20 x values have a mean of 99.94 and the 20 y values have a mean of 98.65. What is the best predicted IQ of the twin born second, given that the twin born first has an IQ of 106? 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 twin born second is (Round to two decimal places as needed.)

Explanation / Answer

Since the correlation is significant, we will use regression equation to determine the best predicted IQ of twin born second.

For x = 106,

y = 2.51 + 0.96*106

y = 104.27

Hence,

The best predicted IQ of the twin born second = 104.27

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

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