Question: (a) The EPA is concerned about the quality of drinking water served on airline flights. A sample of 158 flights yielded poor quality water on 20 flights. At =.05, does this indicate that more than 10% of flights have poor-quality water?

(b) According to the sample, 12.66% (20/158) of the flights served poor-quality water. Can you simply report to the EPA that more than 10% of all airline flights serve poor-quality water? Why or why not?

(c) If an error occurred, what type of error was it?

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