Listed below are the lead concentrations in μ​g/g measured in different traditional medicines. Use a 0.01 significance level to test the claim that the mean lead concentration for all such medicines is less than 16 μ​g/g. Assume that the sample is a simple random sample.   16      6      3.5      7      13.5      6.5      21.5      22      11.5      16

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Listed below are the lead concentrations in
μ​g/g
measured in different traditional medicines. Use a
0.01
significance level to test the claim that the mean lead concentration for all such medicines is less than
16
μ​g/g.
Assume that the sample is a simple random sample.
 
16     
6     
3.5     
7     
13.5     
6.5     
21.5     
22     
11.5     
16
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