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The EPA has stipulated that the Pollution Standard Index (PSI) for clean air standards is to average no more than 100. A random sample of 9 days for the city of Acme showed PSI readings of 144, 85, 90, 120, 150, 105, 93, 130, and 115. The EPA wants to test to determine if Acme air is dirtier than the stipulated clean air standards. Assume the population of PSI readings is highly nonnormal and state the null hypothesis.
Unionization Rates
The proportion of employees in a specific industry or economic sector who belong to trade unions.
African Americans
A racial or ethnic group in the United States with origins in any of the black racial groups of Africa.
Transportation Workers
Individuals employed in sectors responsible for moving goods and people, including drivers, pilots, and conductors.
Unionization
The process by which workers form or join a union, an organized group that collectively bargains with employers over wages, working conditions, and other employment terms.
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