Required information Environmental Protection Agency standards require that the amount of lead in drinking water be less than 15 ppb. Twelve samples of water from a particular source have the following concentrations, in ppb. 11.400 12.400 13.900 8.600 11.200 10.500 14.500 17.100 15.200 9.800 8.100 15.900 A hypothesis test will be performed to determine whether the water from this source meets the EPA standard. What is the P-value?

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