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 marijuana stay in your system if your a regular user? ganga stays in the blood for at least 6 weeks.If its a hair test it could be years? Also detection time for : no longer than 8 weeks.The police can rub a strip on your fou â¦ r head.Witch will give them an instant reading of what your on or have taken.