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

question 15

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 95% 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 39.80
• E)12.50 to 42.35

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Definitions:

Health Consciousness

Health consciousness refers to an individual's awareness and proactive behavior towards maintaining health and preventing disease.

Health Consciousness

An awareness of and making choices toward a healthy and fulfilling life.

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Estimate

An approximate calculation or judgment of a value, number, quantity, or extent of something.