A youth center wants to improve the family life for teenagers at risk for violence. One of the current programs that is being implemented is a type of therapy called Functional Family Therapy. To...

A youth center wants to improve the family life for teenagers at risk for violence. One of the current programs that is being implemented is a type of therapy called Functional Family Therapy. To assess the effectiveness of this type of therapy in reducing violence among youth, two youth centers are selected. One provides Functional Family Therapy to the families of teenagers who have been at the youth center and are being released back into the care of their parents; the other youth center continues its standard practice of follow-up and brief counseling of parents. For each teenager who is being released to his or her family, data are collected on the number of violent encounters with other teenagers, the law, and other family members for 1 month before and after the treatment program was initiated. The following shows four different outcomes that could occur

a.            Graph each outcome.

b.            State whether the treatment condition seems to have been effective.

c. Identify the rival hypotheses that might explain the observed effect.