West - Ward Pharmaceutical, Eatontown, NJ 04/2000 — 05/2002 Chemist, Quality Control Conducted tests on process validation samples. (resumemycareer.com)
The original validation sample consisted of 140 HIV patients among the 600 patients that are treated there, and it was drawn using the method of random sampling. (scirp.org)
They also used tenfold cross validation to train the models for responsiveness, and then tested these on the validation samples as well. (sciencedaily.com)