The Head Librarian at the Library of Congress Has Asked

question 140

Multiple Choice

The head librarian at the Library of Congress has asked her assistant for an interval estimate of the mean number of books checked out each day. The assistant provides the following interval estimate: from 740 to 920 books per day. If the head librarian knows that the population standard deviation is 150 books checked out per day, approximately how large a sample did her assistant use to determine the interval estimate?

• A) 3
• B) 12
• C) 2
• D) It cannot be determined from the information given.

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Definitions:

Prosocial Acts

Behaviors that benefit others or society as a whole, such as helping, sharing, or donating.

Electroconvulsive Therapy

A medical treatment for severe mental illness wherein electric currents are passed through the brain to induce brief seizures, with the goal of relieving symptoms.

Administered Daily

Refers to something, typically medication or treatment, that is given or applied once every day consistently.

Damaging The Brain

Refers to harm or injury to the brain's structure or function, which can result from accidents, diseases, or neurological conditions.