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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. 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 a = .01. What is your conclusion?

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Statistics and Probability, Statistics

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