Question: 6. A 2005 Bureau of Transportation Statistics study reported that of 273 airline passengers surveyed, 246 reported that they were satisfied or very satisfied with the overall experience at the passenger security check point.

1. Construct a 95% confidence interval estimate of the proportion of passengers satisfied or very satisfied with the overall experience at the passenger security checkpoint. What is the margin of error? Round your answers to three decimal places.
2. Construct a 99% confidence interval estimate of the proportion of passengers satisfied or very satisfied with the overall experience at the passenger security checkpoint. What is the margin of error? Round your answers to three decimal places.
3. Which confidence interval is wider? Explain why?
4. Explain the meaning of the 95% confidence interval.

Note: Data downloaded June 20, 2008 from http://www.bts.gov/publications/airline_passenger_opinions_on_security_screening_procedures/.

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