A Random Sample of 85 Group Leaders, Supervisors, and Similar

question 53

Multiple Choice

A random sample of 85 group leaders, supervisors, and similar personnel revealed that on the average a person spent 6.5 years on the job before being promoted. The standard deviation of the sample was 1.7 years. What is the 95% confidence interval for the true population mean?

• A) 6.46 and 6.54
• B) 3.17 and 9.83
• C) 6.13 and 6.87
• D) 6.20 and 6.70
• E) 6.32 and 6.88

---

Definitions:

Worker Interests

Worker interests encompass the economic, social, and professional needs and priorities of employees, including fair wages, safe working conditions, and job security.

Enterprise Contract

A contractual agreement between businesses, or between a business and an individual, that typically involves provision of goods or services.

Business Decision Making

The process by which business leaders and managers choose among alternative strategies or actions to achieve organizational goals.

Justice for Janitors

A social movement and union campaign initiated by the Service Employees International Union (SEIU) focused on improving wages, benefits, and working conditions for janitors through collective bargaining.