To illustrate the effects of driving under the influence(DUI) ofalcohol, a police officer brought a DUI simulator to a local high school. Student reaction time in an emergency was measured with unimpaired vision and also while wearing a pair of special goggles to simulate the effects of alcohol on vision. For a random sample of nineteenagers, the time(in seconds) required to bring the vehicle to a stop from a speed of 60 miles per hour was recorded. Complete parts(a) and(b).

Note: A normal probability plot and boxplot of the data indicate that the differences are approximately normally distributed with no outliers.

X Data Table 2 3 4 5 6 7 8 9 Subject Normal, Xi 4.47 4.34 4.58 4.65 4.31 4.83 4.55 5.00 4.79 Impaired, Y; 5.86 5.85 5.45 5.32 5.90 5.49 5.23 5.63 5.63 Print Done