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 0.815 and the equation of the regression line is y=17.9+0.84x, where x represents the IQ score of the younger child. Also, the 20 x values have a mean of 101.97 and the 20 y values have a mean of 103.95. What is the best predicted IQ of the older child, given that the younger child has an IQ of 110?

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.)

Explanation / Answer

As

y=17.9+0.84x

Then if x = 110,

y^=17.9+0.84*110 = 110.3 [ANSWER]

*****************

Hi! For just the best predicted value, we really just simply substitute x. The other givens would not matter for this part. Thanks!

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

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