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

question 48

Multiple Choice

Brian Vanecek, VP of Operations at Portland Trust Bank, is evaluating the service level provided to walk-in customers.Accordingly, his staff recorded the waiting times for 64 randomly selected walk-in customers and determined that their mean waiting time was 15 minutes.Assume that the population standard deviation is 4 minutes.The 90% confidence interval for the population mean of waiting times is ________.

• A)14.27 to 15.73
• B)14.18 to 15.82
• C)9.88 to 20.12
• D)13.86 to 16.14
• E)18.12 to 19.87

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Definitions:

Earn

To receive income in exchange for services rendered or as a return on investment.

Accumulate

The process of collecting or gathering an increasing quantity of a particular item or data points over time.

Post-Retirement Benefits

Benefits that an employee begins to receive after retiring from a company, including pensions, health insurance, and life insurance.