Reference no: EM132202827

To illustrate the effects of driving under the influence? 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.

Data:

Subject                             Normal, Xi                               Impaired, Yi

1                                        4.49                                           5.77

2                                        4.34                                           5.85

3                                        4.58                                           5.51

4                                        4.65                                           5.29

5                                        4.31                                           5.90

6                                        4.80                                           5.49

7                                        4.55                                           5.23

8                                        5.00                                           5.63

9                                        4.79                                           5.63

(A) Make a 95% confidence interval

(B) Why is this a good idea in designing the? experiment?

(C) State the appropriate conclusion