According to data from the environmental protection agency

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Reference no: EM13613623

According to data from the Environmental Protection Agency, the average daily water consumption for a household of four people in the United States is approximately at least 243 gallons. Suppose a state agency plans to test this claim using an alpha level equal to 0.05 and a random sample of 100 households with four people.

a) State the null and alternative hypotheses.

b) Calculate the probability of committing a Type II error if the population mean is 230 gallons. Assume that the population standard deviation is known to be 40 gallons.

Reference no: EM13613623

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