Ideal height of your mate. Refer to the Chance (Summer 2008) study of the height of the ideal mate, Exercise 11.33

(p. 629). You used the data to fit the simple linear regression model E1y2 = b0 + b1x, where y = ideal partner’s height (in inches) and x = student’s height (in inches), for both males and females.

a. Find a 90% confidence interval for b1 in the model for the male students. Give a practical interpretation of the result.

b. Repeat part a for the female students.

c. Which group, males or females, has the greater increase in ideal partner’s height for every 1 inch increase in student’s height?