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s) We wish to study the pollution levels of a certain chemical in the Genesee River. A random sample of 49 water samples is selected,

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s) We wish to study the pollution levels of a certain chemical in the Genesee River. A random sample of 49 water samples is selected, and the mean amount of the chemical IS determined to be 50 parts per million (ppm) with a standard deviation of 10.78 ppm. Find the 90% confidence interval for the population mean level of the chemical, and state your conclusion

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