A 90% confidence interval for the mean percentage of airline reservations being canceled on the day of the flight is (1.1%, 3.2%). What is the point estimator of the mean percentage of reservations that are canceled on the day of the flight?
A) 1.05%
B) 2.1%
C) 2.15%
D) 1.60%

Question

Quizplus · Accepted Answer

The point estimator is the midpoint of the confidence interval, which is (1.1% + 3.2%) / 2 = 2.15%.

A 90% Confidence Interval for the Mean Percentage of Airline