CJ Two separate after-school programs for atrisk teenagers have been implemented in the city of Redland. One is a big-brother/big-sister mentoring program, in which adult volunteers are paired with troubled teenagers. The second involves extracurricular team sports competitions. In terms of the percentage change in crimes reported to the police over a one-year period, were the programs successful? The results are for random samples of 18 neighborhoods drawn from the entire city.