A Statistics Professor Has 115 Students in a Statistics Class

question 13

Multiple Choice

A statistics professor has 115 students in a statistics class and would like to estimate the number of hours each student studied for the last exam. A random sample of 41 students was found to study an average of 7.3 hours with a standard deviation of 1.9 hours. The 98% confidence interval to estimate the average number of hours studying for the exam is _____.

• A)(6.72, 7.88)
• B)(5.18, 9.42)
• C)(5.82, 8.79)
• D)(6.11, 8.49)

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Definitions:

Income Statement

A financial statement that shows a company's revenues, expenses, and profit over a specific period.

Revenue and Expense Accounts

Accounts used in accounting to track the income generated and expenses incurred by a business, integral to determining net profit or loss.

Income Summary

An account in accounting used to gather all revenue and expenses for a period to calculate net income (or loss).

Owner's Drawings

The amount of cash or other assets withdrawn by the owner from the business for the owner's personal use.