Explain the Role of Margin of Error in Constructing a Confidence Interval
-A 90% confidence interval for the mean percentage of airline reservations being canceled on the day of the flight is (1.2%, 4.5%). What is the point estimator of the mean percentage of reservations that are canceled on the day of the flight
A) 2.85%
B) 1.65%
C) 2.25%
D) 3.3%

Question

Quizplus · Accepted Answer

The point estimator of the mean percentage of reservations that are canceled on the day of the flight is the midpoint of the confidence interval, which is calculated as (1.2% + 4.5%) / 2 = 2.85%.