Question

Listed below are the lead concentrations in μ​g/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 20 μ​g/g.

6     

15.5     

19     

6     

21.5     

22     

11     

15.5     

22     

17.5

Determine the test statistic.

State the final conclusion that addresses the original claim.

(Reject or Fail to Reject) H0. There is (sufficient or insufficient) evidence to conclude that the mean lead concentration for all such medicines is (greater than or equal to or less than or not) 20  μ​g/g.

Answer 1