A Group of 59 Randomly Selected Students Have a Mean $29.5$

question 41

Multiple Choice

A group of 59 randomly selected students have a mean score of $29.5$ with a standard deviation of $5.2$ on a placement test. What is the $90 \%$ confidence interval for the mean score, $\mu$ , of all students taking the test?

• A) \(28.2 < \mu < 30.8\)
• B) \(28.4 < \mu < 30.6\)
• C) \(27.8 < \mu < 31.2\)
• D) \(27.9 < \mu < 31.1\)

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Definitions:

Periodic Inventory System

An inventory system that updates inventory balance and cost of goods sold at the end of an accounting period, not continuously.

Economic Entity Assumption

An accounting principle that states a company and its owner(s) are separate entities for financial reporting purposes.

Expenses

Outflows or other uses of assets or incurrences of liabilities during a period from delivering goods, rendering services, or carrying out other activities.

Proprietorship

A business structure owned by a single individual who is responsible for its liabilities and entitled to its profits.