(1) After hearing the evidence the court shall make and note in the minutes of the proceeding a finding of whether or not the person is a minor requiring authoritative intervention. If it finds that the minor is not such a person, the court shall order the petition dismissed and the minor discharged from any restriction previously ordered in such proceeding.
     (2) If the court finds that the person is a minor requiring authoritative intervention, the court shall note in its findings that the minor does require authoritative intervention. The court shall then set a time for a dispositional hearing to be conducted under Section 3-23 at which hearing the court shall determine whether it is in the best interests of the minor and the public that the minor be made a ward of the court. To assist the court in making this and other determinations at the dispositional hearing, the court may order that an investigation be conducted and a dispositional report be prepared concerning the minor’s physical and mental history and condition, family situation and background, economic status, education, occupation, history of delinquency or criminality, personal habits, and any other information that may be helpful to the court.