I had to Google the definition..
"This term is usually employed to close out probation cases when someone has been placed on probation, not when the court examines its statistics in a regular criminal case. Criminal cases are not generally closed "statistically" because they must be resolved through a trial, dismissal or plea. When a probation case is closed statistically it generally means that while the matter may have been subject to a violation, the probation agency is making an administrative decision to close it on its books, with Court approval."