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:

Methanol

A light, volatile, colorless liquid alcohol used as an antifreeze, solvent, fuel, and as a precursor for various chemicals.

Major Organic Product

The primary product of a chemical reaction involving organic compounds that is formed in the largest amount.

Reaction

A process in which substances, known as reactants, are transformed into different substances, called products, through the breaking and forming of chemical bonds.

Organic Chemistry

A discipline within chemistry dedicated to exploring the makeup, features, structure, chemical reactions, and formation of substances containing carbon.