Listed below are the lead concentrations in μg/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 18μg/g. Assume that the sample is a simple random sample. 6.5 14.5 18,5 14.5 18.5 17 2.5 12.5 15 16
A. H0​ :μ>18μg/g H1 :μ<18μg/g B. H0 :μ=18μg/g H1 :μ=18μg/g
C. H0​ :μ=18μg/g H1 :μ<18μg/g D. H0 :μ=18μg/g H1​ :μ>18μg/g Determine the test statistic. (Round to two decimal places as needed.)