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The industrial plant says that the population mean value of x is =2.0 g/L. However a random sample of n=10 water samples showed x =2.56

The industrial plant says that the population mean value of x is =2.0 g/L. However a random sample of n=10 water samples showed x =2.56 g/L. Does this indicate that the lead concentration population mean is higher than the industrial plant claims? Use =1%

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