Examlex
Explain the difference between assignment bias and selection bias.Which one is a threat to internal validity and which is a threat to external validity?
Performance
The act of carrying out a task, presenting artistic work, or showing how effective a product or idea is.
African Americans
African Americans are a racial or ethnic group in the United States with origins in the black racial groups of Africa, including those who have lived through the slavery era, the Civil Rights Movement, and continue to navigate societal challenges.
Commissions
Bodies established by governments or other organizations to undertake specific tasks or investigate particular issues; also refers to the earnings of salespeople based on sales achieved.
U.S. Army
The principal land warfare branch of the United States Armed Forces.
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