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.

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