Examlex
The variance in the diameter of a bolt should not exceed 0.500 mm. A random sample of n = 12 bolts showed a sample variance of 0.505 mm. The test statistic is χ2 = 11.11.
New Spain
Refers to a territorial entity of the Spanish Empire in North America, Central America, Asia, and Oceania, from the 16th to the 19th century.
Free Black Communities
Historical communities formed by African Americans who were free from slavery, often before the Civil War, creating their own cultural, economic, and social institutions.
Gold and Silver Mines
Sites or locations where gold and silver ore are extracted from the earth, historically significant for their economic value and impact on regional development.
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