Unoccupied seats on flights cause airlines to loose revenue. Suppose a large airline wants to estimate its average number of unoccupied seats per flight over the past year. To accomplish this, the records of 225 flights are randomly selected, and the number of unoccupied seats is noted for each of the sampled flights. The sample mean and standard deviations are
x-bar =11.6 seats s=4.1 seats
Use Central Limit Theorem to help the company estimate its average number of unoccupied seats per flight over the past year.