The Head Librarian at the Library of Congress Has Asked

question 130

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 for a 95% confidence interval,approximately how large a sample did her assistant use to determine the interval estimate?

• A)125
• B)13
• C)11
• D)4

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Definitions:

Preferred Shares

A type of stock that provides a fixed dividend before any dividends are paid to common stockholders and often carries no voting rights.

Basic Earnings

The net income divided by the weighted average number of shares outstanding, representing a company's earnings per share without any adjustments.

Common Shares

Equity securities that represent ownership interests in a corporation, providing voting rights and potential dividends to shareholders.

Preferred Shares

A class of ownership in a corporation with a fixed dividend, that has priority over common shares in the distribution of dividends and assets.