A Random Sample of 85 Group Leaders and Supervisors Revealed

question 90

Multiple Choice

A random sample of 85 group leaders and supervisors revealed that they worked an average of 6.5 years before being promoted. The population standard deviation was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval for the population mean?

• A) 6.99 and 7.99
• B) 4.15 and 7.15
• C) 6.14 and 6.86
• D) 6.49 and 7.49

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Definitions:

War for Independence

Refers to the American Revolutionary War (1775-1783), in which the thirteen American colonies fought for and gained independence from British rule.

Segregated Units

Military or other organizational units that are divided based on race, ethnicity, religion, or gender, often seen historically in the armed forces.

Integrated Units

Military or organizational units composed of members from different racial, ethnic, or gender groups, especially significant in historical contexts of segregation.

Full Persons

Refers to the recognition of individuals' full legal and human rights, often discussed in contexts of civil rights and emancipation.