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 13 ug/g. Assume that the sample is a simple random sample. 10.5 5.5 12 5.5 4 7.5 15.5 18 16.5 12.5 . . . O A. Ho: H= 13 pig/g B. Ho: H= 13 ug/g H1: H> 13 ug/g H,: p 13 ug/g H1: H# 13 ug/g H1: H