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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.
Sternum
The long, flat bone located in the central part of the chest, connecting with the ribs via costal cartilages to form the front part of the rib cage.
False Rib
Refers to the ribs that do not directly attach to the sternum but are connected to the true ribs above them.
Costal Cartilage
Flexible connective tissue that links the ribs to the sternum, facilitating the expansion and contraction of the chest cavity.
Sternum
The long, flat bone located in the center of the chest, to which the ribs are attached anteriorly, also known as the breastbone.
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