Unoccupied Seats on Flights Cause Airlines to Lose Revenue

question 81

Multiple Choice

Unoccupied seats on flights cause airlines to lose revenue.Suppose a large airline wants to estimate its average number of unoccupied seats per flight over the past year.225 flight records are randomly selected and the number of unoccupied seats is noted,with a sample mean of 11.6 seats and a standard deviation of 4.1 seats.How many flights should we select if we wish to estimate μ to within 2 seats and be 95 percent confident?

• A) 130
• B) 65
• C) 33
• D) 17
• E) 12

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