The Head Librarian at the Library of Congress Has Asked

question 186

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,and she asked her assistant to use 25 days of data to construct the interval estimate,what confidence level can she attach to the interval estimate?

• A)99.7%
• B)99.0%
• C)98.0%
• D)95.4%

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Definitions:

Modeling

The process of learning by observing and imitating the behavior of others.

Observation

Observation involves carefully watching, listening, and noting phenomena as they occur naturally without interfering, as a method of gathering data.

Imitation

The action of using someone or something as a model and replicating their behavior or actions.

Beck's Cognitive Therapy

Beck's Cognitive Therapy, developed by psychologist Aaron T. Beck, is a therapeutic approach that identifies and helps change negative and distorted thinking patterns and beliefs to treat depression and other conditions.