Listed below are the lead concentrations in ug/g measured in different traditional medicines. Use a 0.01 significance level to test the claim that the mean lead concentration for all such medicines is less than 15 pg/g. Assume that the sample is a simple random sample. 16 12.5 20 9.5 4.5 20 11 9.5 7.5 18 0 . . . . . Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses? A. Ho: H = 15 pig/g O B. Ho: H = 15 pig/g Hy : p = 15 pg/g Hy: H # 15 ug/g O C. Ho: H > 15 pig/g O D. Ho: H = 15 pig/g Hy : H 15 ug/g Determine the test statistic. (Round to two decimal places as needed.)