Use the Following Information for Questions

Short Answer

Use the following information for questions:
Managerial training programs often teach supervisory skills. Are these training programs effective? A company psychologist administers a test to each of 10 supervisors before and after attending such a training program. Higher scores indicate increased supervisory skills. The results are used to estimate the mean improvement in supervisory skills.
-Give a 95% confidence interval for the population mean improvement in supervisory skills for all supervisors who take the training program.