Listed below are the lead concentrations in ug/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 18 ug/g. Assume that the sample is a simple random sample. 20.5 13 13 5 75 20.5 16.5 195 225 6.5 135 Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses? O A. Ho H> 18 ug/g OB. Ho H = 18 pg/g H1 : H 18 pg/g O C. Ho H= 18 ug/g OD. Ho H= 18 pig/g H1 u