Cyclozocine was an alternative to methadone for treating heroin addiction. The following data came from 14 males who were chronic heroin addicts. After cyclozocine had removed the addicts’ dependence on heroin, they were asked a battery of questions to assess their psychological dependence. The test scores are called Q-scores, and high values represent less psychological dependence. The Q scores were as follows: 51 53 43 36 55 55 39
43 45 27 21 26 22 43
Estimate the average Q score for heroin addicts treated with cyclozocine with 95% confidence.