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Environmental health indicators include air quality, water quality, and food quality. Twenty five years ago, 47% of U.S. food samples contained pesticide residues (U.S. News

Environmental health indicators include air

quality, water quality, and food quality. Twenty five

years ago, 47% of U.S. food samples contained

pesticide residues (U.S. News & World Report, April

17, 2000). In a recent study, 44 of 125 food samples

contained pesticide residues.

a. State the hypotheses that can be used to show

that the population proportion declined.

b. What is the sample proportion?

c. What is the p-value?

d.Use alpha= 0.01

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