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. Two hundred and twenty-five flight records are randomly selected and the number of unoccupied seats is noted, with a sample mean of 11.6 seats and a population standard deviation of 4.1 seats. How many flights should we select if we wish to estimate μ to within 5 seats and be 95 percent confident?

Question

Quizplus · Accepted Answer

n = [(z_α_/2 × s)/E]² = (1.96 × 4.1/5)² = 2.58 = 3

Unoccupied Seats on Flights Cause Airlines to Lose Revenue