To illustrate the effects of driving under the influence? (DUI) of? alcohol, 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 nine? teenagers, the time?(in seconds) required to bring the vehicle to a stop from a speed of 60 miles per hour was recorded. How would I use a? 95% confidence interval to test if there is a difference in braking time with impaired vision and normal vision where the differences are computed as? "impaired minus? normal."?
Subject 1 2 3 4 5 6 7 8 9
Normal, Xi 4.49 4.34 4.58 4.65 4.31 4.80 4.59 5.00 4.79
Impaired, Yi 5.86 5.85 5.51 5.29 5.90 5.49 5.23 5.61 5.63