Normal testosterone levels by age:
http://www.healthline.com/health/low...-levels-by-age
Average adult male = 270-1070 ng/dl that translates to 2,7-10,7ng/ml
(per bloodyelbow 300ng/dL-1100ng/dL -> 3.0 - 11.0ng/ml)
Now if we keep in mind that "Epitestosterone is produced in parallel with testosterone, and in a normal, healthy individual every 1ng/dL of testosterone produces roughly 1ng/dLNatural variance means anything from 0.7x to 2x are pretty common." This would be normal case without external source
If jones gives 4.9 ng/ml (490ng/dl) for testosterone, one would except epi levels anywhere from 3.43 - 9,8 ng/ml (342-980ng/dl). Jon had 27ng/ml (2700ng/dl)
DC example:
If normal variance is 0.7 - 2.0 epi to testo this would mean if DC gives sample of 1000ng/dl of testosterone, within normal variance epi could be 2000ng/dl and still be conciderate as normal. This makes T/E ratio of 0.5.
0.42 and 0.48 are quite steady results and not far from 0.5.