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Suppose we have a scatter diagram for the heights of 3,000 pairs of fathers and sons

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Suppose we have a scatter diagram for the heights of 3,000 pairs of fathers and sons. The summary statistics are: average height of fathers ~ 80 inches SD = 6 inches average height of sons = 78 inches SD = 3 inches, r=0.6 The linear regression line for predicting height of the father(y variable) from the height of their sons(x variable) has slope