Question 6.74

39. The mean height of American women in their early twenties is about 64.5 inches and the standard deviation is about 2.5 inches. The mean height of men the same age is about 68.5 inches, with a standard deviation of about 2.7 inches.

  1. If the correlation between the heights of married heterosexual men and their wives is about , what is the equation of the regression line of the husband’s height on the wife’s height in young couples?
  2. Predict the height of the husband of a married heterosexual woman who is 67 inches tall.

39.

(a) Predicted

(b) 69.85 in.