For Exercises 8.49 to 8.51, see page 437; for 8.52 and 8.53, see pages 439–440; for 8.54 to 8.56, see page 440; for 8.57 to 8.58, see page 444; for 8.59, see page 445; and for 8.60, see page 447.
8.53 Gender and commercial preference, revisited.
Refer to Exercise 8.52. Construct a 95% confidence interval for the difference in proportions that favor Commercial B. Explain how you could have obtained these results from the calculations you did in Exercise 8.52.
8.53
(−0.003, 0.252). We can just reverse the sign of the interval in the previous exercise.