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 Wellbutrin stay in your system after you stop taking it? Wellbutrin is metabolized to active metabolitrs. The half life of the parent drug is 21 hours and that of the active metabolites range from 20 hours to 37 hours dependin â¦ g on the metabolite. This means that it can take from 5 to 8 days for the drug to be eliminated from the body.