Question

Listed below are the lead concentrations in

μ g/g measured 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

15 μ ​g/g. Assume that the lead concentrations in traditional medicines are normally distributed.

6.5     9    10.5    14.5    20.5    16    6.5   4.5   22   16.5

1. What are the null and alternative​ hypotheses?
2. Determine the test statistic.
3. Determine the​ P-value
4. State the final conclusion that addresses the original claim.

Answer 1