A large counselling centre needs to evaluate an experimental program designed for divorce counselling. The key feature of the program is its counsellors, who are married couples working in teams. The centre hopes that this new approach will produce positive outcomes, of course. But there is so little known about this approach that they are simply wondering if there will be a difference from their regular programming. About half of all clients have been randomly assigned to this special program and half to the regular program. The proportion of cases that eventually ended in divorce has been recorded for both. The results for random samples of couples from both programs are reported below. In terms of preventing divorce, did the new program work