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Listed below are the lead concentrations in μ​g/g in different traditional medicines. Use a 0.05 significance...

Listed below are the lead concentrations in μ​g/g in different traditional medicines. Use a 0.05 significance level to test the claim that the mean lead concentration for all such medicines is less than 18 μ​g/g. Assume that the lead concentrations in traditional medicines are normally distributed. 17
8.5
11
16
8.5
20
22
16.5
7.5
10

Math   Statistics-And-Probability   
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