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Environmental health

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Which preconditions have to be fulfilled that I can apply a z-Test here? Is it 0.47*125Environmental health indicators include air quality, water quality, and food quality. Supposethat 25 years ago, 47% of food samples contained pesticide residues (i.e. take this as apopulation value). In a recent study, 44 of 125 food samples contained pesticide residues.State the hypotheses that can be used to test whether the population proportion hasdeclined. Use a = 0.01. What is your conclusion?


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