Reference no: EM1320171

Hypersexual behavior caused by traumatic brain injury (TBI) is often treated with the drug Depo-Provera. In one clinical study, eight young male TBI patients who exhibited hypersexual behavior were treated weekly with 400 mgs of Depo-Provera for six months. The testosterone levels [in ng/DL]prior to treatment and at the end of the 6-month treatment period are given in the table below.

Form the column of differences and find the mean and standard deviation of this column of numbers.