Assume that a simple random sample has been selected and test the given claim. Listed below are the lead concentrations in mu g divided by μg/g measured in different traditional medicines. Use a 0.010 significance level to test the claim that the mean lead concentration for all such medicines is less than 14 μg/g.   3.0      7.0      6.5      5.5      20.0      7.5      13.0      21.5      11.0      18.5

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