58 Ideal height of your mate. Refer to the Chance (Summer 2008) study of the height of the ideal mate, Exercise 45 .

You used the data in the IDHEIGHT file 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?