The following are the results on an assay measuring T levels in saliva samples from 20 middle school children who are also completing a survey on tobacco use.

7, 15, 10,14,19, 12, 15, 8, 10, 17, 20, 6, 9,0,10, 30, 12, 14,33,0

Summarize the data numerically including mean, standard deviation (SD), median and show your work.