The second annual Airplane Etiquette Study commissioned by Expedia asked 1000 Am

Question

The second annual Airplane Etiquette Study commissioned by Expedia asked 1000 Americans to rank the most annoying on-board behaviors of fellow passengers. Rear seat kickers topped the list with 67% of those surveyed ranking this annoying behavior as number one. You create a 99% confidence interval and find the population proportion to be within 0.038 of 0.67, or between (0.632,0.708).

Mutzabaugh, B. The most annoying type of online passengers are... USA Today. http://usat.ly/1zJYjah (accessed May 12, 2015).

Which of the following statements gives a valid interpretation of this interval?

There is a 99% chance that between 63.2% and 70.8% of all Americans would rank rear seat kickers as the most annoying on-board behavior of fellow passengers.

You are 99% confident that between 63.2% and 70.8% of all Americans would rank rear seat kickers as the most annoying on-board behavior of fellow passengers.

You are 99% confident that between 63.2% and 70.8% of the 1000 sampled passengers ranked rear seat kickers as the most annoying on-board behavior of fellow passengers.

There is a 67% chance that between 63.2% and 70.8% of all Americans would rank rear seat kickers as the most annoying on-board behavior of fellow passengers.

Explanation / Answer

The valid interpretation of the given interval is:

You are 99% confident that between 63.2% and 70.8% of all Americans would rank rear seat kickers as the most annoying on-board behavior of fellow passengers.

Option B is correct.

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