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

question 24

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 Acme showed PSI readings of 144, 85, 90, 120, 150, 105, 93, 130, and 115. Assume the population of PSI readings is highly nonnormal. Is there significant evidence to conclude that Acme air is dirtier than the stipulated clean air standards? Test at α = .05.

• A) Reject the null hypothesis.
• B) Do not reject the null hypothesis.

Understand the distinction between dependent and independent variables in an experiment.

Grasp the concept of manipulating independent variables to observe effects on dependent variables.

Understand the role of control groups in experimental research.

Recognize the purpose and methodology of field experiments.

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Definitions:

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Quantitative Approaches

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People's Feelings

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