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.
The amount of time THC metabolites remain detectable depends on many factors, including, but not limited to, quality of marijuana used, amount of marijuana used, frequency of use, and the user's metabolism. A single smoking session on an otherwise clean system can clear in as little as three days.arijuana will stay in your system for 10 days if you have been smoking occasionally. If it is smoked on regular basis it will be there up to 45 days and if you smoke constant pace then it will be in the system for as long as 90 days. http://clnk.me/1yc0I.