The T-Score Formula. The t-score is a fraction. The numerator is the sample's mean minus mean of the group you are comparing the sample to, and the denominator is the sample's standard deviation divided by the square root of the sample size.
If you have smoked marijuana then the drug will stay for 3 to 30 days. This is normal for the common drugs. But in the case of marijuana, this can be detected even after a month in Urine drug test marijuana. Marijuana will stay in your system for 10 days if you have been smoking occasionally.
How Long Does Suboxone Stay in Your System? Suboxone can be detected through drug screening tests via blood, urine, or hair samples. RxList notes a half-life of 24-42 hours in the bloodstream for buprenorphine and just 2-12 hours for naloxone. Typical doses of buprenorphine are detectable in the urine for three days.