A Researcher Is Comparing Two Groups

question 104

Multiple Choice

A researcher is comparing two groups.The population mean from which the samples come is known, but not the population standard deviation.Which test should be used?

• A) either the t or z test
• B) neither the t or z test because more information is needed
• C) z test because the population parameters are known
• D) t test because standard deviation for the population must be estimated

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Definitions:

Freedman's Bureau

A U.S. federal government agency established in 1865 to aid freed African American slaves during the Reconstruction era by providing food, housing, education, and legal support.

President Johnson

Refers to Lyndon B. Johnson, the 36th President of the United States, known for his significant domestic policies, including the Great Society and civil rights advancements.

Emancipation Process

The series of actions leading to the liberation of slaves, most notably exemplified by the Emancipation Proclamation in the United States during the Civil War.

Racial Superiority

The belief that a particular race is superior to others, often used to justify discrimination, segregation, and other maltreatment of those deemed "inferior."