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:

Trade Sales Promotion

Marketing activities and incentives aimed at intermediaries such as wholesalers and retailers to encourage the stocking and promotion of a company’s products.

Retailers

Businesses that sell goods or services to consumers for personal or household use, acting as a final link between producers and consumers.

Allowance

A fixed amount of money given regularly, typically to a child by their parents, for personal spending or to cover specific personal expenses.

Public Relations Campaign

A strategic communication process that builds mutually beneficial relationships between organizations and their publics.