Was charged with DUI and am choosing to go to trial and represent myself. I want a statistical proof that I was under 0.08. I'll send this proof to a university professor to verify its validity. Portable breath test (road side): 0.219 Datamaster breath test (police station): 0.217, 0.203 The first test was 31 minutes after being pulled over and the other two were 44 minutes after that. Armed with this info, I would like to statistically prove that I was under 0.08 when driving (i.e. 31 minutes before portable breath test). I used to take Statistics in college, so I remember there's stuff like sqrt(N) and so forth. Can someone help me out here?