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Listed below are the lead concentrations in ug/g measured in different traditional medicines. Use a 0.10 significance level to test the claim that the mean

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Listed below are the lead concentrations in ug/g measured in different traditional medicines. Use a 0.10 significance level to test the claim that the mean lead concentration for all such medicines is less than 16 pig/g. Assume that the sample is a simple random sample 21 12.5 16.5 12 9.5 3.5 15 13.5 16.5 10.5 2 H1: H

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