A study was conducted to investigate the effectiveness of meditation in reducing pain among women in active labor. Pain scale results (in centimeters) for randomly selected subjects are given in the following table: Subject A B C D E F G H Before 5.5 5.4 8.0 9.3 10.9 6.8 7.2 10 (cm) After 5.8 1.3 6.2 7.6 7.4 4.3 5.7 7.8 (cm) Construct a 98% confidence interval for the mean of the "before - after" differences