SCENARIO 12-1
a Corporation Randomly Selects 150 Salespeople and Finds $\pi$

question 78

Multiple Choice

SCENARIO 12-1
A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self- improvement course would like such a course.The firm did a similar study 10 years ago in which 60% of a random sample of 160 salespeople wanted a self-improvement course.The groups are assumed to be independent random samples.Let $\pi$ ₁ and $\pi$ ₂ represent the true proportion of workers who would like to attend a self-improvement course in the recent study and the past study,respectively.
-Referring to Scenario 12-1,the company tests to determine at the 0.05 level whether the population proportion has changed from the previous study.Which of the following is most correct?

• A)Reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has changed over the intervening 10 years.
• B)Do not reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has not changed over the intervening 10 years.
• C)Reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has increased over the intervening 10 years.
• D)Do not reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has increased over the intervening 10 years.

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Definitions:

Economic Development

The process by which a nation improves the economic, political, and social well-being of its people, typically seen through increases in income, education, and health.

World Bank

A worldwide financial agency offering loans and grants aimed at funding capital improvements in less affluent nations through governmental channels.

International Monetary Fund

An international organization created to promote global economic stability and growth through financial cooperation and assistance.

Agricultural Output

The total quantity of agricultural products produced, including crops and livestock.