Question

Listed below are the lead concentrations in μg/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 μg/g. Assume that the sample is a simple random sample.

18 9.5 20 18 3.5 5.5 7.5 13 3 17.5
Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses?
A. H0: μ = 16 μg/g
   H1: μ > 16 μg/g
B. H0: μ = 16 μg/g
   H1: μ ≠ 16 μg/g
C. H0: μ > 16 μg/g
H1: μ < 16 μg/g
D. H0: μ = 16 μg/g
H1: μ < 16 μg/g

Determine the test statistic. (Round to two decimal places as needed.)
Determine the P-value. (Round to three decimal places as needed.)
State the final conclusion that addresses the original claim.
(1) ----------H0.

(2) There is ------------evidence to conclude that the mean lead concentration for all such medicines is (3)--------16 g/g.

(1) Fail to reject
Reject
(2) sufficient
   not sufficient
(3) less than
equal to
not
greater than

Answer 1