A few years ago, Pepsi invited consumers to take the Pepsi Challenge. Consumers were asked to decide which of 2 sodas, Coke or Pepsi, they preferred in a blind taste test. Pepsi was interested in determining what factors played a role in people's test preferences. One of the factors studied was a gender of the consumer. Below are the results of analyses comparing the test preferences of men and women with the proportions depicting preference for Pepsi. Males n = 109, pm = 0.422 Females n = 52, pf = 0.25 Pm - pf = .172 Z = 2.118 Suppose a 90% confidence interval estimate between the difference in proportion of males and females who prefer Pepsi is (0.05, 0.30). We use this confidence interval to determine if a difference exists in the taste preference of men and women. Our conclusion should be that: The proportion of men who prefer Pepsi is not the same as the proportion of women who prefer Pepsi The proportion of men who prefer Pepsi is the same as the proportion of women who prefer Pepsi The number of men who prefer Pepsi is not the same as the number of women who prefer Pepsi The number of men who prefer Pepsi is the same as the number of women who prefer Pepsi