Suppose IQ scores were obtained from randomly selected couples. For 20 such pair

Question

Suppose IQ scores were obtained from randomly selected couples. For 20 such pairs of people the linear correlation coefficient e 0.953 and the equation of the regression line is y = - 23.47 + 1.22x, where x represents the IQ score of the husband. Also, the 20 x values have a mean of 100.2 and the 20 y values have a mean of What is the best predicted IQ of the wife, given that the husband has an IQ of 104? 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 wife is

Explanation / Answer

The regression equation given in the problem statement is y=-23.47+1.22x

We know that in this question x is 104 and we need to find the value of y

substitute the value of x in the regression equation to obtain the value of y

thus, y is -23.47+1.22*104 =103.41

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