Brian Vanecek, VP of Operations at Portland Trust Bank, Is

question 21

Multiple Choice

Brian Vanecek, VP of Operations at Portland Trust Bank, is evaluating the service level provided to walk-in customers.Brian would like to minimize the variance of waiting time for these customers, since this would mean each customer received the same level of service.Accordingly, his staff recorded the waiting times for 15 randomly selected walk-in customers, and determined that their mean waiting time was 15 minutes and that the standard deviation was 4 minutes.Assume that waiting time is normally distributed.The 90% confidence interval for the population variance of waiting times is ________.

• A)9.46 to 34.09
• B)56.25 to 64.87
• C)11.05 to 16.03
• D)8.58 to 39.79
• E)12.50 to 42.35

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Definitions:

Natural Resource

Assets that occur in the environment naturally, such as minerals, forests, and water bodies, which can be used for economic benefit.

Depletion

The allocation of the cost of natural resources over their useful life.

Statutory Depletion

A tax deduction allowing an owner to account for the reduction of a product's reserves.

Financial Reporting

The process of disclosing financial results and related information to stakeholders and the public, which includes balance sheets, income statements, and more.