Suppose IQ scores were obtained from randomly selected coupl

Suppose IQ scores were obtained from randomly selected couples. For 20 such pairs of people, the linear correlation coefficient is 0.840, and the equation of the regression line is y=10.9+0.88x, where x represents the IQ score of the wife. Also, the 20 x values havea mean of 99.23 and the 20 y values have a mean of 98.7. What is the best predicted IQ of the husband, given that the wife has an IQ of 91? Use a significance level of 0.05.

The best predicted IQ of the husband is ___.

(Round to 2 decimal places as needed.)

Solution

We don\'t need so much information since you provided the regression line. The iq of the husband whose wife has a iq of 91 is given by

y=10.9+(.88*91)=90.08