A Local Library Is Evaluating the Possibility of Expanding Its

question 5

Multiple Choice

A local library is evaluating the possibility of expanding its hours of operation.The library staff want to estimate the mean number of persons who patronize the library during the peak weekday hours from 3:30 P.M.to 5:00 P.M.They randomly sample 12 weekdays and find an average attendance of 220.15, with a standard deviation of 22.4.What is a 90% confidence interval for the true mean weekly patronage during the peak hours?

• A) (208.627, 231.673)
• B) (209.514, 230.787)
• C) (179.920, 260.380)
• D) (208.537, 231.763)

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Definitions:

Import Statement

A code statement used to bring a specific class or an entire package into visibility, so its members can be accessed without specifying their fully qualified name.

Random Number

A number generated by a process, whose outcome is unpredictable, and which cannot be subsequently reliably reproduced.

Java Statement

A command that can be carried out by the Java interpreter, like declaring a variable or invoking a method.

Deprecated Methods

Methods that are still available but are no longer recommended for use, often because they have been replaced by newer, more efficient alternatives.