TABLE 10-10 A Corporation Randomly Selects 150 Salespeople and Finds That 66

question 41

Multiple Choice

TABLE 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 π₁ and π₂ 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 Table 10-10, what is/are the critical value(s) when performing a Z test on whether population proportions are different if α = 0.05?

• A) ±1.645
• B) ±1.96
• C) -1.96
• D) ±2.08

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Definitions:

Specific Phobia

A type of anxiety disorder characterized by an extreme and irrational fear of a specific object, situation, or activity.

Social Phobia

An anxiety disorder characterized by a significant fear of being embarrassed, judged, or scrutinized by others in social or performance situations.

Obsessions

Persistent, intrusive thoughts, images, or urges that cause significant anxiety or distress.

Compulsions

Repetitive behaviors or mental acts that an individual feels driven to perform, often in response to an obsession or according to rigidly applied rules.