The EPA Has Stipulated That the Pollution Standard Index (PSI)for

question 47

Multiple Choice

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 Acorn showed PSI readings of 144,85,90,120,150,105,93,130,and 115.Assume the population of PSI readings is highly nonnormal.The EPA wants to determine if there is significant evidence to conclude that Acorn's air is dirtier than the stipulated clean air standards.Which one of the following tests is appropriate for this problem?

• A)Wilcoxon signed ranks test
• B)Wilcoxon rank sum test
• C)Sign test
• D)Kruskal-Wallis test
• E)Spearman's rank correlation test

---

Definitions:

Emergency

A sudden, urgent situation requiring immediate action, often to prevent harm or damage.

Small Town

A community with a small population, typically offering a close-knit environment and fewer amenities than a city.

Frustrated

Feeling of being upset or annoyed, typically as a result of inability to change or achieve something.

Guilty

A state of having committed a specific offense or violation, often associated with legal culpability or moral responsibility.