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.
Several other things can affect how long Ativan stays in a personâs system including their body weight or how much of the drug is consumed. According to AddictionBlog.org, large doses of the drug can stay in a personâs system for several weeks. Ativan can also be detected in hair for about 90 days.