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.Calculate a 95 percent confidence interval for μ,the mean number of unoccupied seats per flight during the past year.

Question

Quizplus · Accepted Answer

The 95% confidence interval is calculated using the formula: sample mean ± (critical value * standard deviation / sqrt(sample size)). Here, the critical value for 95% confidence with a large sample size is approximately 1.96. Thus, the interval is 11.6 ± (1.96 * 4.1 / sqrt(225)), which calculates to [11.06, 12.14].

Unoccupied Seats on Flights Cause Airlines to Lose Revenue