Equation of the regression line


Suppose IQ scores were obtained from randomly selected couples. For 20 such pairs of people, the linear correlation coefficient is 0.896 and the equation of the regression line is y^=6.22 + 0.95x, where x represents the IQ score of the wife. Also, the 20 x values have a mean of 98.48 and the 20 y values have a mean of 100.05. What is the best predicted IQ of the husband, given that the wife has an IQ of 107? Use a significance level of 0.05.

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Basic Statistics: Equation of the regression line
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