A 90% Confidence Interval for the Mean Percentage of Airline

question 31

Multiple Choice

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%

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Definitions:

Income

The financial gain earned by an individual or a company, usually measured over a specific time period and derived from various sources like sales or investments.

Construction Expense

Costs directly related to the construction of a building or infrastructure, including materials, labor, and other expenses incurred during the process of building.

Percentage-Of-Completion Method

An accounting technique used to recognize revenue and expenses of long-term contracts as a percentage of work completed during the period.

Actual Construction Costs

The total expenses incurred during the construction of a building or infrastructure, including materials, labor, and any other costs.