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:

Egocentric

A term referring to the inability or difficulty in understanding a perspective other than one's own.

Formal-Operations

A stage in Piaget's theory of cognitive development, typically beginning around age 12, where individuals start to use abstract and logical thinking.

Concrete-Operations

A stage in Piaget's theory of cognitive development where children gain the ability to think logically about concrete events.

Preoperational Child

Refers to the stage in Piaget’s theory of cognitive development (ages 2-7) where children begin to use language and think symbolically, but their thinking is still intuitive and egocentric.