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:

Product Costs

Costs that are incurred to acquire or manufacture a product, which typically include direct materials, direct labor, and manufacturing overhead.

Direct Labor

The cost of wages for employees who are directly involved in the production of goods or services.

Direct Materials

Refers to the raw materials that are directly incorporated into a finished product during the manufacturing process.

Overhead Costs

Expenses related to the day-to-day running of a business that are not directly linked to a specific product or service, such as rent, utilities, and administrative expenses.