Listed below are the lead concentrations in 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 16 g/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: = 16 g/g

H1: > 16 g/g

B. H0: = 16 g/g

H1: 16 g/g

C. H0: > 16 g/g

H1: < 16 g/g

D. H0: = 16 g/g

H1: < 16 g/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