Analyzing Poll Results A market researcher for American Airlines was instructed to randomly select passengers waiting to board. (The author was one of the selected subjects.) The passengers were asked several questions about the airline service. Responses were recorded along with their genders, which are listed in the order in which they were selected.

a. Use a 0.05 significance level to test the claim that the sequence is random.

b. Use a 0.05 significance level to test the claim that the proportion of women is different from 0.5. Use the parametric test described in Section 7-3.

c. Use a 0.05 significance level to test the claim that the proportion of women is different from 0.5. Use the sign test described in Section 12-2.

d. Use the sample data to construct a 95% confidence interval for the proportion of women.

e. What do the preceding results suggest? Is the sample biased against either gender?

Was the sample obtained in a random sequence? If you are the manager, do you have any problems with these results?

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