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.

Question 8.57

8.57 Gender and commercial preference

Refer to Exercise 8.52 (page 439), which compared women and men with regard to their preference for one of two commercials.

  1. State appropriate null and alternative hypotheses for this setting. Give a justification for your choice.
  2. Use the data given in Exercise 8.52 (page 439) to perform a two-sided significance test. Give the test statistic and the -value.
  3. Summarize the results of your significance test.

8.57

(a) . Not knowing anything about the two commercials, there is no reason to believe men or women will prefer Commercial A more, so the test should be two-sided. (b) . (c) The data do not show evidence of a difference between women and men concerning preference of Commercial A.