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

question 80

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.Is there significant evidence to conclude that Acorn's 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.

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