A 90% confidence interval for the mean percentage of airline reservations being canceled on the day of the flight is (1.3%, 5%). What is the point estimator of the mean percentage of reservations that are canceled on the day of the flight?
A) 3.15%
B) 1.85%
C) 2.50%
D) 3.7%

Question

Quizplus · Accepted Answer

The point estimator of the mean is the midpoint of the confidence interval, which is (1.3% + 5%) / 2 = 3.15%.

A 90% Confidence Interval for the Mean Percentage of Airline