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:

Motor Symptoms

Physical signs of dysfunction often related to movement, including tremors, stiffness, and difficulty with coordination, seen in various neurological disorders.

Tremors

Involuntary, rhythmic muscle movements involving to-and-fro movements of one or more parts of the body, often affecting the hands, arms, head, or voice.

Lewy Bodies

Abnormal aggregates of protein that develop inside nerve cells, associated with Parkinson's disease and dementia.

Parkinson's Disease

A long-term degenerative disorder of the central nervous system that mainly affects the motor system, leading to symptoms such as tremors, rigidity, and bradykinesia.