The second annual Airplane Etiquette Study commissioned by Expedia asked 1000 Am
ID: 3319953 • Letter: T
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.