Question

A high school wanted to teach students about the effects of driving while under the influence. A police officer allowed students to wear special goggles that simulated the effects of driving while impaired. A random sample of eight students was selected. The reaction time it took for each student to stop from a speed of 55 mph was recorded while the student was not wearing the goggles (unimpaired) and then again while wearing the goggles (impaired). Construct a 95% confidence interval. Round answers to two decimal places.

Participant | Unimpaired | Impaired | Difference |

1 | 4.36 | 5.73 | 1.37 |

2 | 5.01 | 4.57 | -0.44 |

3 | 4.14 | 5.54 | 1.4 |

4 | 4.62 | 5.53 | 0.91 |

5 | 4.56 | 5.23 | 0.67 |

6 | 4.17 | 5.78 | 1.61 |

7 | 4.54 | 5.1 | 0.56 |

8 | 4.7 | 5.47 | 0.77 |

Mean | 4.51 | 5.37 | 0.86 |

SD | 0.29 | 0.40 | 0.65 |

What is the lower bound of the 95% CI?

What is the upper bound of the 95% CI?

Answer #1

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...

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...

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...

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...

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...

Subject
1
2
3
4
5
6
7
8
9
Normal, Upper X Subscript iXi
4.494.49
4.344.34
4.584.58
4.564.56
4.314.31
4.834.83
4.594.59
5.005.00
4.794.79
Impaired, Upper Y Subscript iYi
5.775.77
5.675.67
5.515.51
5.295.29
5.905.90
5.495.49
5.235.23
5.615.61
5.635.63
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...

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