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PRACTICE ANOTHER A paper summarizes data from 61 young children living in a particular county in a particular state who had their blood lead levels measured as part of a routine healthcare visit The sample mean blood level was 16 g dL and the sample standard deviation was 6 7 g dL Suppose that it is reasonable to regard this sample as representative of young children living in this county Do these data provide convincing evidence that the mean blood lead level for young children in this county is greater than 10 g dL Carry out a hypothesis test using a 0 01 Hint See Example 12 11 USE SALT State the appropriate null and alternative hypotheses in g dL Enter for as needed Ho H Find the test statistic Round your answer to two decimal places Use technology to find the P value Round your answer to four decimal places P value State the conclusion in the problem context Reject Ho We do not have convincing evidence that the mean blood lead level for young children in this county is greater than 10 g dL Fail to reject Ho We do not have convincing evidence that the mean blood lead level for young children in this county is greater than 10 g dL Fail to reject H We have convincing evidence that the mean blood lead level for young children in this county is greater than 10 g dL Reject Ho We have convincing evidence that the mean blood lead level for young children in this county is greater than 10 g dL

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