SCENARIO 10-10
a Corporation Randomly Selects 150 Salespeople and Finds $\pi$

question 185

Multiple Choice

SCENARIO 10-10
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 10-10,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 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:

Self-Checkout Lines

Automated systems in retail environments that allow customers to scan, bag, and pay for their purchases without human assistance.

Gini Index Scores

A measure of income inequality within a population, ranging from 0 (perfect equality) to 1 (perfect inequality).

Symbolic Interactionism

A sociological perspective that emphasizes the role of symbols and language as core elements of all human interaction.

Economic Situations

Refers to the current state of the economy in a specific region, including factors such as employment, GDP, and inflation.