The mean height of married American women in their early 20s is 64.5 inches and the standard
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The mean height of married American women in their early 20s is 64.5 inches and the standard deviation is 2.5 inches. The mean height of married men the same age is 68.5 inches with standard deviation 2.7 inches. The correlation between the heights of husbands and wives is about r = 0.5.
a. Find the equation of the least-squares regression line for predicting a husband’s height from his wife’s height for married couples in their early 20s.
b. Suppose that the height of a randomly selected wife was 1 standard deviation below average. Predict the height of her husband without using the least-squares line.
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In our case the wifes height is the explanatory variable and the husbands height is ...View the full answer
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