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.
Next. i took about 3 adderall (20mg) w/o a prescription about 2.5 weeks ago, and have a drug test coming up soon...how long will this stay in my system for the urine drug test?eport Abuse. holy crap dont scare the guy... dont worry about it.. adderall only stays in your system TOPS up to 5-7 days. and that 7-10 years thc in the hair thing is a bunch of bull. i have to take a bunch of drug tests and know my way around that crap.