SCENARIO 10-10 a Corporation Randomly Selects 150 Salespeople and Finds

question 15

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 and 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:

Comparison

The act of evaluating two or more items, people, or situations to identify similarities, differences, or to ascertain superiority.

Uncertainty-Identity Theory

A social psychological theory suggesting that people join and identify with groups in order to reduce feelings of uncertainty about themselves and the world.

Social Identity Processes

The mechanisms through which individuals develop and maintain their social identity, including categorization, identification, and comparison with other groups.

Uncertainty

Uncertainty involves situations where the outcomes, probabilities, or implications are unclear, often leading to ambiguity and indecision.