16. Early in the HIV epidemic, there was poor knowledge of HIV transmission risks among health care staff. A short training was developed to improve knowledge and attitudes around HIV. 15 individuals participated in the training program and they were tested twice. They would be tested initially, then they would be trained, and then they would be tested again after the training. The scores were recorded in the following table. (CANVAS text file: 'HIV transmission dataset) No training 20 17 15 22 18 14 27 20 16 10 20 20 8 17 14 Trained 22 21 21 24 20 17 28 16 21 10 27 23 15 22 16 Construct 98% confidence interval for the mean difference (1-2) where and be the mean test scores before and after the training program. 177