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.
For a blood test, Phentermine stays in your system for  approximately 30 days. For a urine test, this product will be in  your system for about 2 weeks. -it can stay in your urine for about a month-the best way to get it out of your system is detox, cranberry supplements, or drink A LOT of cranberry juice.