Question 6.92

57. The equation of the least-squares regression line for predicting dates’ heights from women’s heights for the data in Exercise 55 is

  1. What is the slope of this line?
  2. Explain in simple language what the numerical value of the slope tells us about the heights of the people these women date.
  3. Use the regression line to predict the height of the next person dated by a woman who is 67 inches tall.

57.

(a) 0.42

(b) For each additional inch of a woman’s height, the height of the next person dated goes up by 0.42 in., on average.

(c) 69.22 in.