Listed below are the lead concentrations in jig/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 21 pg/g. Assume that the sample is a simple random sample. 18 15.5 14 21 17 22.5 19.5 19.5 12.5 17.5 0 Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses? O A. Ho: H = 21 ug/g O B. Ho: H > 21 ug/g Hq: H > 21 ug/g Hy: H